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Virtual Machines - overview


Operating Systems Accomplishment | 1968

IBM researcher: Robert A. Nelson, David Sayre

Where the work was done: IBM T.J. Watson Research Center

What we accomplished: The IBM M44/44X, an experimental computer system, was a groundbreaking machine used to explore paging, the virtual machine concept and computer performance measurement. Wikipedia observes that the term "virtual machine" probably originated with the M44/44X project, from which it was later appropriated by the CP-40 team to replace their earlier term pseudo machine.

Related links: R. A. Nelson, "Mapping Devices and the M44 Data Processing System," Research Report RC 1303, IBM Thomas J. Watson Research Center (1964); D. Sayre, "On Virtual Systems," IBM Thomas J. Watson Research Center (April 15, 1966).

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