Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!zaphod.mps.ohio-state.edu!uwm.edu!ux1.cso.uiuc.edu!ux1.cso.uiuc.edu!m.cs.uiuc.edu!gillies
From: gillies@m.cs.uiuc.edu
Newsgroups: comp.sys.mac.system
Subject: Re: The Mouse -- What is its Histor
Message-ID: <70500062@m.cs.uiuc.edu>
Date: 9 Oct 90 17:35:00 GMT
References: <2385@runxtsa.runx.oz.au>
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Nf-ID: #R:runxtsa.runx.oz.au:2385:m.cs.uiuc.edu:70500062:000:317
Nf-From: m.cs.uiuc.edu!gillies    Oct  9 12:35:00 1990


I thought the reason Xerox went to a two button mouse, was that
"chording" (depressing two buttons at once) was a decent substitute
for a 3rd button (assuming double-chording was not needed).  It may be
that Engelbrecht did not consider this trick, hence, the Xerox mouse
is still a faithful incarnation of his ideas.