CP-67 was the "control program" portion of
CP/CMS, a virtual machineoperating system developed for the IBM System/360-67by IBM's Cambridge Scientific Center. It was a reimplementation of their earlier research system CP-40, which ran on a one-off customized S/360-40. CP-67 was later reimplemented (again) as CP-370, which IBM released as VM/370 in 1972, when virtual memorywas added to the System/370series. Details on the development and circumstances of CP-67 can be found in the article History of CP/CMS.
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