Deployed c63e902 with MkDocs version: 1.2.3

404.html

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+      <a href="/school-of-sre/level101/messagequeue/intro/" class="md-nav__link">
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+    <li class="md-nav__item">
+      <a href="/school-of-sre/level101/messagequeue/key_concepts/" class="md-nav__link">
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+          
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+  
+    <li class="md-nav__item">
+      <a href="/school-of-sre/level101/messagequeue/further_reading/" class="md-nav__link">
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         Big Data
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       </label>
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CODE_OF_CONDUCT/index.html

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+    <li class="md-nav__item">
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CONTRIBUTING/index.html

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       <label class="md-nav__link" for="nav-2-3-3">
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+    <li class="md-nav__item">
+      <a href="../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
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+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
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+          
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+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
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index.html

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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
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+          Message Queue
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+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
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+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
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+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
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         Big Data
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       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
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+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/big_data/evolution/index.html

@@ -839,19 +839,83 @@
   
   
     
+    <li class="md-nav__item md-nav__item--nested">
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+          Message Queue
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+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
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     <li class="md-nav__item md-nav__item--active md-nav__item--nested">
       
       
-        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" checked>
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         Big Data
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       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
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+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/big_data/intro/index.html

@@ -839,19 +839,83 @@
   
   
     
+    <li class="md-nav__item md-nav__item--nested">
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+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
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+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
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+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
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-        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" checked>
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       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
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-          <a href="../../databases_nosql/further_reading/" class="md-footer-nav__link md-footer-nav__link--prev" rel="prev">
+          <a href="../../messagequeue/further_reading/" class="md-footer-nav__link md-footer-nav__link--prev" rel="prev">
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level101/big_data/tasks/index.html

@@ -839,19 +839,83 @@
   
   
     
+    <li class="md-nav__item md-nav__item--nested">
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+          Message Queue
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+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
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-        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" checked>
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         Big Data
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       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
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+        <label class="md-nav__title" for="nav-2-3-4">
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           Big Data
         </label>

level101/databases_nosql/further_reading/index.html

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       <label class="md-nav__link" for="nav-2-3-3">
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+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
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+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
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+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
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+  
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+          
+            
+  
+  
+  
+    
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       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
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           <span class="md-nav__icon md-icon"></span>
           Big Data
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@@ -2090,7 +2154,7 @@
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-          <a href="../../big_data/intro/" class="md-footer-nav__link md-footer-nav__link--next" rel="next">
+          <a href="../../messagequeue/intro/" class="md-footer-nav__link md-footer-nav__link--next" rel="next">
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                 <span class="md-footer-nav__direction">

level101/databases_nosql/intro/index.html

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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
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+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
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+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
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+  
+
+          
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+    </li>
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+          
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+  
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         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/databases_nosql/key_concepts/index.html

@@ -926,11 +926,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
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+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
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+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/databases_sql/backup_recovery/index.html

@@ -908,11 +908,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/databases_sql/concepts/index.html

@@ -881,11 +881,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/databases_sql/conclusion/index.html

@@ -885,11 +885,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/databases_sql/innodb/index.html

@@ -895,11 +895,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/databases_sql/intro/index.html

@@ -920,11 +920,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/databases_sql/lab/index.html

@@ -849,11 +849,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/databases_sql/mysql/index.html

@@ -881,11 +881,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/databases_sql/operations/index.html

@@ -849,11 +849,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/databases_sql/query_performance/index.html

@@ -908,11 +908,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/databases_sql/replication/index.html

@@ -901,11 +901,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/databases_sql/select_query/index.html

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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/git/branches/index.html

@@ -885,11 +885,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/git/conclusion/index.html

@@ -881,11 +881,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/git/git-basics/index.html

@@ -982,11 +982,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/git/github-hooks/index.html

@@ -885,11 +885,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/linux_basics/command_line_basics/index.html

@@ -1070,11 +1070,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/linux_basics/conclusion/index.html

@@ -892,11 +892,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/linux_basics/intro/index.html

@@ -961,11 +961,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/linux_basics/linux_server_administration/index.html

@@ -1164,11 +1164,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/linux_networking/conclusion/index.html

@@ -856,11 +856,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/linux_networking/dns/index.html

@@ -885,11 +885,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/linux_networking/http/index.html

@@ -856,11 +856,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/linux_networking/intro/index.html

@@ -913,11 +913,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/linux_networking/ipr/index.html

@@ -885,11 +885,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/linux_networking/tcp/index.html

@@ -885,11 +885,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/linux_networking/udp/index.html

@@ -885,11 +885,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/metrics_and_monitoring/alerts/index.html

@@ -843,11 +843,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/metrics_and_monitoring/best_practices/index.html

@@ -843,11 +843,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/metrics_and_monitoring/command-line_tools/index.html

@@ -843,11 +843,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/metrics_and_monitoring/conclusion/index.html

@@ -843,11 +843,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/metrics_and_monitoring/introduction/index.html

@@ -843,11 +843,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/metrics_and_monitoring/observability/index.html

@@ -843,11 +843,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/metrics_and_monitoring/third-party_monitoring/index.html

@@ -843,11 +843,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/python_web/intro/index.html

@@ -938,11 +938,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/python_web/python-concepts/index.html

@@ -917,11 +917,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/python_web/python-web-flask/index.html

@@ -890,11 +890,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/python_web/sre-conclusion/index.html

@@ -911,11 +911,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/python_web/url-shorten-app/index.html

@@ -924,11 +924,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/security/conclusion/index.html

@@ -843,11 +843,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/security/fundamentals/index.html

@@ -843,11 +843,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/security/intro/index.html

@@ -843,11 +843,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/security/network_security/index.html

@@ -843,11 +843,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/security/threats_attacks_defences/index.html

@@ -843,11 +843,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/security/writing_secure_code/index.html

@@ -843,11 +843,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/systems_design/availability/index.html

@@ -843,11 +843,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/systems_design/conclusion/index.html

@@ -843,11 +843,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/systems_design/fault-tolerance/index.html

@@ -843,11 +843,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/systems_design/intro/index.html

@@ -843,11 +843,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level101/systems_design/scalability/index.html

@@ -843,11 +843,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/containerization_and_orchestration/conclusion/index.html

@@ -841,11 +841,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/containerization_and_orchestration/containerization_with_docker/index.html

@@ -841,11 +841,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/containerization_and_orchestration/intro/index.html

@@ -841,11 +841,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/containerization_and_orchestration/intro_to_containers/index.html

@@ -841,11 +841,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/containerization_and_orchestration/orchestration_with_kubernetes/index.html

@@ -841,11 +841,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/continuous_integration_and_continuous_delivery/cicd_brief_history/index.html

@@ -841,11 +841,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/continuous_integration_and_continuous_delivery/conclusion/index.html

@@ -841,11 +841,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/continuous_integration_and_continuous_delivery/continuous_delivery_release_pipeline/index.html

@@ -836,11 +836,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/continuous_integration_and_continuous_delivery/continuous_integration_build_pipeline/index.html

@@ -836,11 +836,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/continuous_integration_and_continuous_delivery/introduction/index.html

@@ -841,11 +841,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/continuous_integration_and_continuous_delivery/introduction_to_cicd/index.html

@@ -841,11 +841,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/continuous_integration_and_continuous_delivery/jenkins_cicd_pipeline_hands_on_lab/index.html

@@ -841,11 +841,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/linux_intermediate/archiving_backup/index.html

@@ -841,11 +841,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/linux_intermediate/bashscripting/index.html

@@ -841,11 +841,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/linux_intermediate/conclusion/index.html

@@ -841,11 +841,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/linux_intermediate/introduction/index.html

@@ -841,11 +841,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/linux_intermediate/introvim/index.html

@@ -841,11 +841,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/linux_intermediate/package_management/index.html

@@ -841,11 +841,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/linux_intermediate/storage_media/index.html

@@ -841,11 +841,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/networking/conclusion/index.html

@@ -836,11 +836,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/networking/infrastructure-features/index.html

@@ -841,11 +841,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/networking/introduction/index.html

@@ -841,11 +841,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/networking/rtt/index.html

@@ -841,11 +841,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/networking/scale/index.html

@@ -841,11 +841,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/networking/security/index.html

@@ -841,11 +841,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/system_calls_and_signals/conclusion/index.html

@@ -841,11 +841,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/system_calls_and_signals/intro/index.html

@@ -841,11 +841,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/system_calls_and_signals/signals/index.html

@@ -841,11 +841,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/system_calls_and_signals/system_calls/index.html

@@ -841,11 +841,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/system_design/conclusion/index.html

@@ -836,11 +836,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/system_design/intro/index.html

@@ -841,11 +841,75 @@
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       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/system_design/large-system-design/index.html

@@ -841,11 +841,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/system_design/resiliency/index.html

@@ -841,11 +841,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/system_design/scaling-beyond-the-datacenter/index.html

@@ -841,11 +841,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/system_design/scaling/index.html

@@ -841,11 +841,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/system_troubleshooting_and_performance/conclusion/index.html

@@ -841,11 +841,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/system_troubleshooting_and_performance/important-tools/index.html

@@ -841,11 +841,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>

level102/system_troubleshooting_and_performance/introduction/index.html

@@ -841,11 +841,75 @@
         <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-3" type="checkbox" id="nav-2-3-3" >
       
       <label class="md-nav__link" for="nav-2-3-3">
+        Message Queue
+        <span class="md-nav__icon md-icon"></span>
+      </label>
+      <nav class="md-nav" aria-label="Message Queue" data-md-level="3">
+        <label class="md-nav__title" for="nav-2-3-3">
+          <span class="md-nav__icon md-icon"></span>
+          Message Queue
+        </label>
+        <ul class="md-nav__list" data-md-scrollfix>
+          
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/intro/" class="md-nav__link">
+        Introduction
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/key_concepts/" class="md-nav__link">
+        Key Concepts
+      </a>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    <li class="md-nav__item">
+      <a href="../../../level101/messagequeue/further_reading/" class="md-nav__link">
+        Conclusion
+      </a>
+    </li>
+  
+
+          
+        </ul>
+      </nav>
+    </li>
+  
+
+          
+            
+  
+  
+  
+    
+    <li class="md-nav__item md-nav__item--nested">
+      
+      
+        <input class="md-nav__toggle md-toggle" data-md-toggle="nav-2-3-4" type="checkbox" id="nav-2-3-4" >
+      
+      <label class="md-nav__link" for="nav-2-3-4">
         Big Data
         <span class="md-nav__icon md-icon"></span>
       </label>
       <nav class="md-nav" aria-label="Big Data" data-md-level="3">
-        <label class="md-nav__title" for="nav-2-3-3">
+        <label class="md-nav__title" for="nav-2-3-4">
           <span class="md-nav__icon md-icon"></span>
           Big Data
         </label>