1CVS is a version control system, which allows you to keep old versions
2of files (usually source code), keep a log of who, when, and why changes
3occurred, etc., like RCS  or SCCS. Unlike the simpler systems, CVS
4does not just operate on one file at a time or one directory at a time,
5but operates on hierarchical collections of directories consisting of
6version controlled files. CVS helps to manage releases and to control
7the concurrent editing of source files among multiple authors. CVS
8allows triggers to enable/log/control various operations and works well
9over a wide area network (see man pages).
10