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ICT 1900 was a family of mainframe computers released by International Computers and Tabulators (ICT) and later International Computers Limited (ICL) during the 1960s and 1970s. The 1900 series was notable for being one of the few non-American competitors to the IBM System/360, enjoying significant success in the European and British Commonwealth markets.
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John Kenneth Iliffe was a British computer designer who worked on the design and evaluation of computers that supported fine-grained memory protection and object management. He implemented, evaluated and refined such designs in the Rice Institute Computer, R1 (1958–61) and the ICL Basic Language Machine (1963–68). A key feature in the architectures of both machines was control by the hardware of the formation and use of memory references so that the memory could be seen as a collection of data objects of defined sizes whose integrity is protected from the consequences of errors in address calculation, such as overrunning memory pointers.
References
- 1 2 Arthur Dransfield (Autumn 2012). "Memories of Maximop Development". Resurrection. Computer Conservation Society. Retrieved 9 January 2015.
- ↑ McLain, T.G.; Trice, A.R. (1970). "The MINIMOP multi-access operating system". The Computer Journal. 13 (3): 237–242. doi:10.1093/comjnl/13.3.237.
- ↑ Brandon, J. (1974). "Job Control Languages: MAXIMOP and CAFE". Proceedings of the BCS Symposium on Job Control Languages—Past Present and Future, NCC. Manchester, England.
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