This article is from the Douglas Adams FAQ, by Nathan Hughes nhughes@umich.edu with numerous contributions by others.
You can find this (lengthy) discussion at my ftp site at ftp.umd.umich.edu
in people/nhughes/hhg/diff.us.uk. I decided to take it out of the FAQ
to conserve space (and bandwidth), but will put it back if I'm requested
to. It's also available on the IHG at
http://www.umd.umich.edu/~nhughes/dna/faqs/diff.html.
Cheers!
 
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