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Search Result for "tops-10":

The Jargon File (version 4.4.7, 29 Dec 2003):

TOPS-10 /tops?ten/, n. DEC's proprietary OS for the fabled PDP-10 machines, long a favorite of hackers but now long extinct. A fountain of hacker folklore; see Appendix A. See also ITS, TOPS-20, TWENEX, VMS, operating system. TOPS-10 was sometimes called BOTS-10 (from ?bottoms-ten?) as a comment on the inappropriateness of describing it as the top of anything.
The Free On-line Dictionary of Computing (18 March 2015):

TOPS-10 /tops-ten/ DEC's proprietary OS for the fabled PDP-10 machines, long a favourite of hackers but now effectively extinct. A fountain of hacker folklore. See also ITS, TOPS-20, TWENEX, VMS, operating system. TOPS-10 was sometimes called BOTS-10 (from "bottoms-ten") as a comment on the inappropriateness of describing it as the top of anything. [Jargon File]