CVS is a freely available collection of programs that provide for
software release and revision control functions.  It is designed to
work on top of the RCS distribution, V4 and later.  CVS does
understand how to parse older RCS formats, but cannot do any of the
fancier features (like vendor branch support) without RCS branch
support.

CVS is a front end to the rcs(1) revision control system which extends
the notion of revision control from a collection of files in a single
directory to a hierarchical collection of directories consisting of
revision controlled files.  These directories and files can be
combined together to form a software release.  CVS provides the
functions necessary to manage these software releases and to control
the concurrent editing of source files among multiple software
developers.

 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
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-rw-rw-r-- 20025/200   1964566 6246400  31.5% -lh5- 6b8f Mar 30  1998 cvs-1.9.16-src.tar
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         1 file  1964566 6246400  31.5%            Mar 16  1998