Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!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 History?
Message-ID: <70500046@m.cs.uiuc.edu>
Date: 2 Oct 90 04:28:00 GMT
References: <94731@<90274>
Lines: 12
Nf-ID: #R:<90274:94731:m.cs.uiuc.edu:70500046:000:540
Nf-From: m.cs.uiuc.edu!gillies    Oct  1 23:28:00 1990


> Interestingly, Apple did make a fairly major contribution to mouse
							      ^
> technology, which was being the first to use a rubber ball that
> depended on gravity to hold it in contact with the rollers. This cut
> mouse-production costs by 75%.

Perhaps you should insert the word "mechanical" in the paragraph
above.  When the Macintosh 128K was released, Xerox was already
manufacturing optical mice using laser diodes at a wholesale cost of
$5 per mouse.  I suspect that most mechanical mice still have a higher
wholesale cost.