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Here is a brief Census of Computers as of June 30, 1969, although it doesn't have any details about the machines. Only DEC, NCR, UNIVAC, and IBM had families of machines which had shipped more than 1,000 copies, although DEC reached this number by combining all of the PDP-8 models into one number. If IBM had done that with the 360 models, it would have added up to 20,255. That's more than 1/4 of all of the commercial computers in the US! This says a lot about the dominance of IBM at that time, and the success of the 360 (and IBM's marketing and sales forces).
Copyright © 1999 Aron K. Insinga. All rights reserved.