subversion is a modern replacement to CVS. CVS was originally a bunch of wrapper shell scripts around diff3(1) and RCS, and is showing it's age.
Subversion has a "changeset", a commit is one atomic operation that either completes or fails. CVS has one operation per file. Subversion can deal with files being renamed and/or moved, cvs can't. Subversion can versioncontrol directories, CVS can't.
Notes:
No other page links to Subversion yet.
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