Installed svn 1.6.6. Subversion is a tool that allows many people to collaborate together on software development. There is a central repository of code, and then each person or group has their own "working copy". Code may be downloaded from the repository (a "checkout") or sent back up to the repository ("a commit"). All past revisions of code in the repository are stored, and may be accessed at any time. The code may often also be browsed on a web page.