PRCS, the Project Revision Control System, is a version control program with purpose similar to that of CVS. It was designed with simplicity in mind. Like CVS, PRCS uses RCS to accomplish this task, but this is inconsequential to the user, as RCS is completely hidden beneath a layer of abstraction. PRCS has a website on SourceForge at http://prcs.sourceforge.net/. It can be downloaded there.