graph TD
  SRE[Site Reliability Engineering]

  SRE --> Cul[Culture]
    Cul --> SLA
    Cul --> SLO
    Cul --> Inc[Incidents]
      Inc --> Onc[On-call]
      Inc --> ReM[Incident Reponse]
      Inc --> PoM[Post-Mortem]

  SRE --> SW[Software Engineering]
  SW --> PL[Programming Languages]
    PL --> SysPL[Systems Programming Languages]
      SysPL --> Rust
      SysPL --> Go
        Go --> GoRoutines
        Go --> Channels
        Go --> Select
        Go --> GC
    PL --> ScrPL[Script Programming Languages]
      ScrPL --> Ruby
      ScrPL --> Python
    PL --> FunPL[Functional Programming Languages]
      FunPL --> Haskell
      FunPL --> Lisp

  SW --> PT[Programming Topics]
    PT --> ALG[Algorithms]
      ALG --> SRT[Sorting]
      ALG --> CPX[Complexity]
    PT --> DS[Data Scructures]
      DS --> Lock[Lock]
      DS --> Futex[Futex]
      DS --> Semaphore
      DS --> Graph[Graph]
      DS --> T3[Tree]
      DS --> HS[HashMap/HashTable]

    SW --> DB[Databases]
      DB --> DBT[Theory]
        DBT --> CAP[CAP Theorem]
        DBT --> DBTS[Scaling]
        DBT --> DBTR[Replication]
        DBT --> DBTX[Sharding]
        DBT --> DBTO[Operating]
      DB --> SQL[SQL]
        SQL --> rSQL[Row-oriented]
          rSQL --> PgSQL
            PgSQL --> rSQLRep[Replication]
            PgSQL --> rSQLOps[Operating]
              rSQLOps --> rSQLOpsVac[Vacuum]
          rSQL --> MySQL
            MySQL --> mSQLRep[Replication]
            MySQL --> mSQLOps[Operating]
        SQL --> cSQL[Column-oriented]
          cSQL --> Redshift
      DB --> NoSQL[NoSQL]
        NoSQL --> KV[KeyValue]
          KV --> Rd[Redis]
            Rd --> RdSn[Sentinel]
            Rd --> RdCls[Cluster]
            Rd --> RdSh[Sharding]
            Rd --> RdRBAC[RBAC]
            Rd --> RdEC[ElastiCache]
              RdEC --> RdECG[Global Datastore]
        NoSQL --> DoS[DocumentStore]
          DoS --> Mng[Mongo]
          DoS --> ES[ElasticSearch]
        NoSQL --> CS[Cassandra]
    SW --> LD[Ledgers]

  SW --> DSi[Distributed Systems]
    DSi --> BHP[Bulkhead Pattern]
    DSi --> CBP[Circuit Breaker Pattern]
    DSi --> EvS[Event Sourcing]
    DSi --> CQRS[CQRS - Command Query Responsibility Segregation]
    DSi --> DPro[Distributed Processing]
      DPro --> HDP[Hadoop]
    DSi --> DLB[Load Balancing]
    DSi --> STM[Streaming]
      STM --> Kafka
      STM --> Kinesis
      STM --> NATS
    DSi --> RPC[Remote Procedure Call]
      RPC --> AVRO
      RPC --> Protobufs
      RPC --> Thrift
    DSi --> SDi[Service Discovery]
      SDi --> SDiSS[Server Side]
      SDi --> SDiCS[Client Side]

  SRE --> OPS[Operations]
    OPS --> OS[Operating Systems]
      OS --> MM[Memory]
        MM --> Heap
        MM --> Stack
        MM --> PAG[Pagination]
      OS --> PRO[Process]
        PRO --> IPC[Inter Process Communication]
          IPC --> IPCM[Message Passing]
          IPC --> IPCSM[Shared Memory]
      OS --> CCY[Concurrency]
        CCY --> Thread
          Thread --> PThread
      OS --> UNIX[Unix]
        UNIX --> eBPF[eBPF]
    OPS --> OPSOPS[Operational]
      OPSOPS --> Ter[Terminal]
        Ter --> Bash
        Ter --> PrM[Process Monitoring]
          PrM --> ps
          PrM --> top
          PrM --> htop
          PrM --> atop
          PrM --> lsof
        Ter --> Netw[Network]
          Netw --> dig
          Netw --> iptables
          Netw --> nmap
          Netw --> tcpdump
          Netw --> ping
          Netw --> mtr
          Netw --> traceroute
          Netw --> airmon
          Netw --> airodump
    OPS --> IaC[Infrastructure as Code]
      IaC --> Cont[Containers]
        Cont --> Engine
          Engine --> Docker
        Cont --> Runtime
          Runtime --> OCI[OCI - Standard]
          Runtime --> Docker
          Runtime --> Containerd
      IaC --> CfgMgt[Configuration Management]
        CfgMgt --> Puppet
        CfgMgt --> Ansible
        CfgMgt --> Chef
      IaC --> Orc[Orchestration]
        Orc --> ECS[Elastic Container Service]
        Orc --> K8S[Kubernetes]
        Orc --> Mesos
        Orc --> Nomad
        Orc --> SerM[ServiceMesh]
          SerM --> IsT[Istio]
      IaC --> Prov[Provisioning]
        Prov --> TF[Terraform]
          TF --> TFhcl[HCL Language]
          TF --> TFp[Custom Providers]
          TF --> TFm[Management]
            TFm --> TFa[Atlantis]
            TFm --> TFc[Terraform Cloud]
        Prov --> CDK[Cloud Formation Development Kit]
        Prov --> PK[Packer]
      IaC --> SecM[Secret Management]
        SecM --> Vlt[Vaul]
      IaC --> SessM[Session Management]
        SessM --> Bdry[Boundary]
    OPS --> NET[Networking]
      NET --> NETP[Protocols]
        NETP --> DNS
        NETP --> Socket
        NETP --> UDP
        NETP --> TCP
          TCP --> SSH
          TCP --> HTTP
          TCP --> SSL[TLS-SSL]
            SSL --> mTLS[mTLS]
          TCP --> MQTT[MQTT]
      NET --> NETE[Edge]
        NETE --> CDN
        NETE --> GAL[Global Accelerator]
      NET --> VPC[VPC Virtual Private Cloud]
        VPC --> MVPC[Multi-VPC]
          MVPC --> VPCP[Peering]
          MVPC --> VPCPL[PrivateLink]
          MVPC --> VPCT[Transit Gateway]
    OPS --> MON[Monitoring]
      MON --> Metr[Metrics]
        Metr --> OTEL[OpenTelemetry]
        Metr --> Prom[Prometheus]
        Metr --> Infl[InfluxDB]
        Metr --> DD[Datadog]
        Metr --> Graf[Grafana]
        Metr --> Statsd[Statsd]
      MON --> Logs[Logs]
        Logs --> Logstash
      MON --> Tra[Tracing]
        Tra --> OPT[Open Tracing]
        Tra --> Jae[Jaegger]
    OPS --> SVL[Serverless]
      SVL --> SAM[Serverless Application Model]
      SVL --> LBD[Lambda]
      SEC --> ENC[Encryption]
      SEC --> SECMON[Monitoring]
      SEC --> CERT[Certificates]
    OPS --> SEC[Security]
      SEC --> FIR[Firewall]
        FIR --> WAF[Web Application Firewall]
    OPS --> COST[Cost]
      COST --> CloudCos[Cloud]
        CloudCos --> FOps[FinOps]
          FOps --> AWS