Concurrent Versions System
In the field of software development, the Concurrent Versions System (CVS), also known as the Concurrent Versioning System, is a free software revision control system. Version control system software keeps track of all work and all changes in a set of files, and allows several developers (potentially widely separated in space and/or time) to collaborate. Dick Grune developed CVS in the 1980s. CVS has become popular in the open source software world and is released under the GNU General Public License.