<P> VM ( often : VM / CMS ) is a family of IBM virtual machine operating systems used on IBM mainframes System / 370 , System / 390 , zSeries , System z and compatible systems , including the Hercules emulator for personal computers . The first version , released in 1972 , was VM / 370 , or officially Virtual Machine Facility / 370 . This was a System / 370 reimplementation of earlier CP / CMS operating system . Milestone versions included VM / SP . The current version , z / VM , is still widely used as one of the main full virtualization solutions for the mainframe market . </P>
<P> VM ( often : VM / CMS ) is a family of IBM virtual machine operating systems used on IBM mainframes System / 370 , System / 390 , zSeries , System z and compatible systems , including the Hercules emulator for personal computers . The first version , released in 1972 , was VM / 370 , or officially Virtual Machine Facility / 370 . This was a System / 370 reimplementation of earlier CP / CMS operating system . Milestone versions included VM / SP . The current version , z / VM , is still widely used as one of the main full virtualization solutions for the mainframe market . </P>
what is the name of virtual machine that the mainframe called had
what is the name of virtual machine that the mainframe called had
VM ( often : VM / CMS )
VM ( often : VM / CMS )