Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10 5/3/83; site rabbit.UUCP Path: utzoo!linus!philabs!cmcl2!floyd!whuxlb!pyuxll!eisx!npoiv!npois!hogpc!houxm!mhuxa!mhuxi!mhuxt!eagle!alice!rabbit!ark 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.