IBM CP-40

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IBM CP

IBM CPThe IBM CP-40 was a research precursor to CP-67, which in turn was part of IBM’s then revolutionary CP[-67]/CMS. CP-40 ran multiple instances of client operating systems, particularly CMS, the Cambridge Monitor System, built as part of the same effort. CP-40/CMS production use began in January 1967. CP-40 ran on a unique, specially modified IBM System/360 Model 40. It was the first operating system which had implemented complete virtualization.

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