Date: Mon, 2 Aug 2004 10:53:15 -0700 (PDT) From: "Dwight K. Elvey" <dwight.elvey(a)amd.com> Subject: rarest computers. was: RE: Xerox Alto Restoration + Emulation Al Kossow would certainly beg to differ... he has some, I believe, and knows others who do. Oooooooh a liststorm coming! First, define 'rare'... I would say, less than 10 machines known to exist, as an arbitrary figure. OK, here's the Corestore contribution: Two pdp-12s (not 'rare' by above definition, but rareish and very much in demand) Three pdp-10s (a KS (not very rare), a KL 1091 (rare), and a KL 2065 (rare) Two pdp-15s (I know of one other in UK, 4 others in USA) An IBM 1800 (unique, as far as I know) Two IBM System/32s (again unique - know of no others in collections) A Thinking Machines CM-2a (very few other CMs around, but my -2a is unique AFAIK) I'd like to add an IBM System/360 Model 40 to the list, but it *still* isn't here... negotiating! Any of these systems folks wouldn't consider 'rare'? Curious... What rare machine do I covet most? A System/360 Model 30. KA or KI pdp-10 a close second. Web pages: http://www.corestore.org/12.htm (no page for 2nd pdp-12 yet) http://www.corestore.org/15-1.htm http://www.corestore.org/15-2.htm http://www.corestore.org/dec20.htm http://www.corestore.org/dec10.htm http://www.corestore.org/2065move.htm (no proper page yet) http://www.corestore.org/1800-2.htm http://www.corestore.org/32.htm (no page for 2nd System/32 yet) http://www.corestore.org/cm2a.htm Mike http://www.corestore.org