RCS info wanted

[Amir J. Katz Xpert]

There is an alternative to SCCS, called RCS (Revision Control System).
Questions:
1. Is this a commercial product or public domain ?
2. Where can I get more information about RCS ?
3. Is it better than SCCS ? If so, why ?

-- TIA,
--

   Amir J. Katz, System Manager

Internet:	amir at taux01.nsc.com
UUCP:		{decwrl,uunet,...}!nsc!taux01!amir
Phone:		+972 52-570713
Fax:		+972 52-570719
Snail-mail:	Amir J. Katz, Silvaco Israel Ltd.
		19 Maskit St., Herzelia, Israel