Details on access,v file of RCS in unix

I'm not too familiar with RCS but here's a tutorial of it that hopefully will help:

http://www.csc.calpoly.edu/~dbutler/tutorials/winter96/rcs/

Have you tried CVS?

I would like to have a detailed information on as to what are the contents of access,v file in RCS.

Specifically what does the "symbols" keyword mean and what kind of information does it contain.