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Line 7: == History == {{section rewrite\|date=December 2024}} [[IBM]] developed the concept of [[hypervisor]]s ([[virtual machine]]s in [[IBM CP-40\|CP-40]] and [[CP-67]]) and in 1972 provided it for the [[IBM System/370\|S/370]] as [[VM (operating system)\|Virtual Machine Facility/370]].<ref>{{ cite book \|url=http://www.vm.ibm.com/pubs/HCSF8A50.PDF \|title=z/VMbuilt on IBM Virtualization Technology General Information Version 4 Release 3.0 \|id=GC24-5991-04 \|date=2002-04-12 \|publisher=[[IBM]]}}</ref> IBM introduced the Start Interpretive Execution (SIE) instruction (designed specifically for the execution of virtual machines) in 1983 as part of [[IBM System/370-XA\|370-XA]] architecture on the [[IBM 3081]], as well as VM/XA versions of VM to exploit it.

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