Editing VM (operating system) (section)

{{short description|Family of IBM operating systems}}
{{tooshort|date=September 2024}}
{{Infobox OS
| name                   = z/VM
| logo                   = VM mascot - teddy bear.png
| logo size              = 64px
| screenshot             =
| caption                = Teddy bear – VM's mascot since 1983.
| developer              = [[IBM]]
| source_model           = 1972–1986 [[Open-source software|Open source]], 1977–present [[Closed source]]
| kernel_type            =
| supported_platforms    = [[System/370]], [[System/390]], [[zSeries]], [[IBM zEnterprise System]]
| ui                     =
| family                 = VM family
| released               = {{Start date and age|1972}}
| latest_release_version = IBM z/VM V7.3 <!-- If you update this, don't forget to update [[Comparison of operating systems]]-->
| latest_release_date    = {{Start date and age|2022|09|16}}
| latest_test_version    =
| latest_test_date       =
| marketing_target       = [[IBM mainframe]] computers
| programmed_in          =
| prog_language          =
| language               = [[English language|English]]
| updatemodel            =
| package_manager        =
| working_state          = Current
| license                = 1972–1981 [[Public domain]], 1976–present [[Proprietary software|Proprietary]]
| website                = {{url|www.vm.ibm.com}}
}}
{{History of IBM mainframe operating systems|vm}}
[[File:VM370 Rel 6 default login screen.png|thumb|The default login screen on VM/370 Release 6]]

'''VM''' (often: '''VM/CMS''') is a family of [[IBM]] [[virtual machine]] [[operating system]]s used on [[IBM mainframe]]s [[System/370]], [[System/390]], [[zSeries]], [[System z]] and compatible systems, including the [[Hercules (emulator)|Hercules emulator]] for personal computers.