Rcs: Revision Control System
5.7
The Revision Control System (RCS) manages multiple revisions of files. RCS automates the storing, retrieval, logging, identification, and merging of revisions. RCS is useful for text that is revised frequently, e.g., programs, documentation, graphics, papers, and form letters.
http://www.fsf.org/software/rcs/rcs.html
If you download the Setup version of the package, the dependencies, as listed below under Requirements, are already included, apart from msvcrt.dll. If you download the package as Zip files, then you must take care of the dependencies yourself.
General Installation Instructions