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Date: Fri, 18 May 2012 10:52:31 +0300
From: Eli Zaretskii <eliz AT gnu DOT org>
Subject: Re: incompatible
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> From: Sterten AT aol DOT com
> Date: Fri, 18 May 2012 01:40:39 -0400 (EDT)
> 
> i've been told that my old programs (GCC 3.2,DJGPP) no longer run on modern 
>  computers.

Details, please.  What OS are those "modern" computers running?
Crystal ball says Vista or Windows 7 (or later), but please do tell.

The answers to the rest of your questions depend on the above.