A key component in any CI/CD pipeline is version control, which allows multiple developers to collaborate on code while ensuring traceability and rollback options.

• Git
  1. Distributed version control system (DVCS) that allows developers to work offline and merge their changes.
  2. Popular for its branching model, which is essential in CI/CD workflows.
• SVN (Subversion)
  1. Centralized version control system. Though less popular than Git today, it's still in use in some organizations with legacy codebases.