Concurrent Versions System

Concurrent Versions System (CVS) is an open-source revision control system for software development, dating back to the 1980s (with the current CVS descending from a 1990 release of "version 1.0", though there were earlier versions with a different code base). It used to be very popular for open-source projects, though in more recent times Git is more popular. It is not to be confused with the CVS drug store chain, or with CSV files.

Links

 * Wikipedia article
 * Official site
 * Manual for version 1.12.13