Revision Control System, a SCM that is gradually being replaced with CVS (which is mostly compatible at an archive file level, but which is much more sophisticated and capable. Use CVS instead of RCS for new projects...)

CVS uses RCS under the covers.

[...]

See http://tcllib.sourceforge.net/doc/rcs.html for information about a tcllib package for RCS.

• GNU RCS homepage
• Wikipedia RCS entry

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