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Issue No. 01 - January-March (2005 vol. 27)
ISSN: 1058-6180
pp: 4-16
Shigeru Takahashi , Katayanagi Institute
The rise and fall of plug-compatible mainframes spanned more than 20 years. RCA, whose 1964 Spectra 70 System was compatible with the IBM System/360, chose another path altogether, so Amdahl in 1970 became the first true PCM manufacturer. Other companies--notably Fujitsu and Hitachi--soon followed, seeking to complete with IBM in the mainframe arena. This article traces the history of PCMs, which includes an intriguing incident of industrial espionage.
PCM, architecture, compatibility, Industrial Espionage, Hitachi, Fujitsu, Amdahl, Itel

S. Takahashi, "The Rise and Fall of Plug-Compatible Mainframes," in IEEE Annals of the History of Computing, vol. 27, no. , pp. 4-16, 2005.
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