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From: ark@rabbit.UUCP
Newsgroups: net.misc
Subject: Re: 'Artificially' different products
Message-ID: <1680@rabbit.UUCP>
Date: Tue, 12-Jul-83 10:58:35 EDT
Article-I.D.: rabbit.1680
Posted: Tue Jul 12 10:58:35 1983
Date-Received: Wed, 13-Jul-83 19:40:17 EDT
References: <108@ucbvax.UUCP>
Organization: Bell Labs, Murray Hill
Lines: 13

stopwatches in calculators:  You may be talking about the HP-45 and
HP-55.  The HP-45 did indeed have an undocumented stopwatch feature
that the HP-55 had in documented form.  However, the HP-55 was also
programmable.  Furthermore, the -45 didn't have a crystal-based
oscillator, so the stopwatch was only accurate to 10% or so.

As for TI and HP calculators having the same chips -- I doubt it.
Casual investigation will reveal that the two machines give
significantly different results -- at least one TI I have seen
does its arithmetic to 13 places, of which the last few are
garbage, and HP's machines all do arithmetic to only ten places,
but with great care given to rounding and accuracy.  On the whole,
I'd trust HP's arithmetic more.