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Issue No.01 - January-March (2005 vol.27)
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
Shigeru Takahashi, "The Rise and Fall of Plug-Compatible Mainframes", IEEE Annals of the History of Computing, vol.27, no. 1, pp. 4-16, January-March 2005, doi:10.1109/MAHC.2005.15
1. As of 6 January 2001, MITI was reorganized as the Ministry of Economy, Trade and Industry (METI).
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24. In September 1990, IBM announced the ESA/390 architecture as a further enhancement of the 370-XA. At the same time, IBM introduced the ES/9000 series of processors, which was later renamed as the series S/390.
25. J. Vijiyan, "Amdahl Planning to Exit Mainframe Business," Computerworld,23 Oct. 2000, pp. 1-3.
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