This is Debian/GNU Linux's prepackaged version of the FSF's Revision Control System (RCS) utilities. These utilities allow you to keep multiple revisions of one or more files in a very compact manner. RCS is similar to, and in most respects better than, the non-free Source Code Control System (SCCS). This package was assembled by Sven Rudolph from the GNU sources available from prep.ai.mit.edu (and its numerous mirrors) as /pub/gnu/rcs-5.7.tar.gz. It is currently maintained by Mark Baker Copyright (C) 1991,1992,1993 Free Software Foundation, Inc. RCS is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. RCS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. On Debian GNU/Linux systems, the complete text of the GNU General Public License can be found in `/usr/doc/copyright/GPL'.