[dba-Tech] WORD:Retreiving lost documents

I'm far from being an "AVID" word user.  but a co-worker here was 
working on a document for over 3hrs and closed his application down 
(normally) and somehow he didn't hit save, possibly closing down many 
other documents at at time.  Is there anyway to revive this "lost" 
information?

I know the lesson here, but ... :| it won't help my friend out. tips, 
links sites are all welcomed.

thanks,

-- 
-Francisco