"J J" <azreal1977 at hotmail.com> writes:
> MC and version are version control systems like SVN, CVS, Darcs, etc.
> Universes, as I understand them, are like the packaging systems found
> on Debian, RedHat, etc.

Yes.

I like to say that MC is a "package format", and PU helps with
"package sharing" or "package distribution".

-Lex