[pdftex] pdftex Digest, Vol 42, Issue 3

[Oleg Katsitadze]

On Thu, Jul 20, 2006 at 06:52:17PM -0400, John R. Culleton wrote:
> program editor kept previous editions on record by keeping
> reverse delta files.

Why, it's still possible.  For simple needs (like one file)
there's RCS, and for larger projects there are CVS and
Subversion.  Some text editors (Emacs, for example) support
them and allow checking-in / diffing / reverting from inside
the editor.  And at least rcs is very simple to use, once
you get past a couple screenfuls of the manpage :)  (try
`man rcsintro').

(I must mention that RCS and CVS are only good with text
files, not binaries.  But after all, that's the only true
way to store the documents. :)

Best,
Oleg