Does anyone have a pointer to information on when these were introduced?
I seem to remember late 80's early 90s.

I have a company claiming "25 years experience" with NIMH, and I think it
may be 100 people for three months :)

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Dave's Engineering Page: http://www.dvanhorn.org

I would have a link to http://www.findu.com/cgi-bin/find.cgi?KC6ETE-9 here
in my signature line, but due to the inability of sysadmins at TELOCITY to
differentiate a signature line from the text of an email, I am forbidden to
have it.

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