Description:

CSSC is the GNU Project's replacement for SCCS. SCCS is a proprietary
suite of tools which is provided with most commercial versions of
Unix. The purpose behind CSSC is to provide a work-alike for SCCS
which can be used on the various Free versions of Unix. SCCS was the
only major form of source code control on Unix platforms for many
years, until RCS came along. SCCS was an effective method for small
projects, but these days is less popular, particularly for projects
involving large numbers of files. A fair amount of old software is
still in SCCS form, and CSSC is designed to retrieve that software.