VMS /V-M-S/ N. DEC's Proprietary Operating System For Its VAX Minicompute

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VMS /V-M-S/ n.

DEC's proprietary operating system for its
VAX minicomputer; one of the seven or so environments that loom
largest in hacker folklore. Many Unix fans generously concede that
VMS would probably be the hacker's favorite commercial OS if Unix
didn't exist; though true, this makes VMS fans furious. One major
hacker gripe with VMS concerns its slowness -- thus the following

There once was a system called VMS
Of cycles by no means abstemious.
It's chock-full of hacks
And runs on a VAX
And makes my poor stomach all squeamious.
--- The Great Quux

See also VAX, TOPS-10, TOPS-20,