This document provides an overview of Subversion (SVN), a version control system. It discusses why developers should use version control, defines what SVN is, and how it works with a centralized repository. Key aspects covered include checking out and updating code, adding/deleting files, resolving conflicts, and committing changes. The document also outlines SVN's repository structure of trunk, branches, and tags. In the end, it provides best practices for using SVN effectively.