TL;DR DevOps

DevOps = Develop + Deploy + Maintain

Develop => Languages (C#, Java, Js...),
Version Control & Collaboration (Tfs, Git ...),
Build & test automation (Tfs build, Maven, Selenium ...),
Continious integration & delivery (Tf rm, Jenkins ...)


Deploy => Container plateform (Docker ...),
Configuration management (Powershell, bash ...),
Microservice plateform (Kubernetes, openshift ...),
Provisioning (Ssh, Docker swarm, Power shell ...)

Maintain => Logging (Logstash/Elastic search, ...),
Monitoring & Alerting & Analytics (Kibana, Nagios, Zabbix ...)