initial S/370 series) reflects, at least in part, the success of the CP/CMS approach. In turn the survival and success of IBM's VM operating system family, and of virtualization technology in general, owe much to the S/360-67. In many respects, IBM's CP-67 and CP/CMS products anticipated (and heavily influenced) contemporary virtualization software, such as VMware Workstation, Xen, and Microsoft Virtual PC. Related terminology CP: Control Program. CP-40 and CP-67 were implementations for CSC's customized S/360-40 and the standard S/360-67, respectively. CMS: Cambridge Monitor System. This portion of the CP/CMS system was renamed Conversational Monitor System when IBM released VM/370. Unlike the CP-to-VM transition, however, which was a reimplementation, much of CMS was moved without modification from CP/CMS into VM/370. VM: Virtual Machine, initially the term pseudo-machine was used, but soon virtual machine was borrowed from the IBM M44/44X project. It was well established in CP/CMS by the time IBM introduced VM/370. hypervisor: a mechanism for paravirtualization. This term was coined in IBM's reimplementation of CP-67 as VM/370. See also VP/CSS History of IBM Time-sharing system evolution CMS file system Footnotes Citations Detailed citations for points made in this article can be found in History of CP/CMS. External links VM/CMS handbook Andreas C. Hofmann: CP-370/CMS – Control Program 370 / Cambridge Monitor System, 1970, in: Computing History Dictionary (german) [¹10.12.2022] History of software IBM mainframe operating systems Time-sharing operating systems Virtualization software VM (operating system) 1960s software