View source for VMS

{{Infobox OS 
| image = vms47.png
| caption = Logging into a 4.7 VMS system
| name = VMS
| creator = [[Digital Equipment Corporation]]
| current version = 7.3 (for VAX)<br/>8.4 (for Alpha and Itanium)<br/>9.2 (for x86)
}}

'''VMS ''' is a high-end, secure, [[multi-tasking]] [[operating system]] written by [[Digital Equipment Corporation]] and currently actively maintained by [[VMS Software, Inc.]] (VSI).

It runs on the [[VAX]], [[Alpha]], [[Itanium]], and [[Intel x86|x86]] platforms. Beginning with '''VMS''' V5.5, the OS was renamed to '''OpenVMS'''.

'''VMS ''' has been ported to x86 by VMS Software, Inc..

==Supported machines/architectures (by example)==

{| class="wikitable
| Version
| Machines
|-
| VAX/VMS V1.0
| [[VAX-11/780]]
|-
| VAX/VMS V2.0
| [[VAX-11/750]]
|-
| VAX/VMS V3.0
| [[VAX-11/730]]
|-
| VAX/VMS V4.0
| [[VAX 8600]]
|-
| [[MicroVMS]] V4.0
| [[MicroVAX I]] / [[MicroVAX II]]
|-
| VAX/VMS V5.0-2A
| [[VAX 6000 series|VAX 6000]]
|-
| OpenVMS AXP V1.0
| [[Alpha]]
|-
| OpenVMS V8.0
| [[Itanium]]
|-
| OpenVMS V9.0
| [[x86]]
|}

==Emulation==

VMS and OpenVMS can be run on [[SIMH]]'s VAX simulators.  OpenVMS can also run on [[ES 40 Emulator]] which will run the Alpha version.  Although VMS is still a commercial operating system, just like many varieties of commercial [[UNIX]] and [[Windows]], VMS Software, Inc. (which is the current owner of most of DEC's assets) has a hobbyist program which allows licenses to be obtained for non-commercial uses for the Alpha, Itanium, and x86 platforms. 

There are currently no known hobbyist licenses for OpenVMS/VAX versions V5.x and higher.

See the following:

 * http://www.wherry.com/gadgets/retrocomputing/vax-simh.html

==See also==

* [[Installing VMS V1.0 on SIMH]]
* [[Customizing VMS V1.0‎‎]]
* [[:Category:VMS Practical Guides|VMS Practical Guides]]
* [[VAXcluster]]
* [[ODS2]]
* [[THE VAXORCIST|Upgrade horror story: Literally.]]

==External links==

* [https://wiki.vmssoftware.com/Main_Page VSI OpenVMS Wiki]
* [https://web.archive.org/web/20170825003059/http://h41379.www4.hpe.com/openvms/os/openvms-release-history.txt OpenVMS release history] (via Wayback machine).
* [https://vmssoftware.com/about/roadmap/#vms-software-support-roadmap VSI OpenVMS Support Roadmap]
* [http://www.vaxarchive.org/hardware/vms-hw.html VAX/VMS Versions] - "which VMS versions are supported on which CPUs"

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{{Nav VAX}}

[[Category: DEC Operating Systems]]
[[Category: VAX Operating Systems]]
[[Category: VMS]]