Editing PDP-11 (section)

=== From third parties ===
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* [[ANDOS]]
* [[CSI-DOS]]
* [[DEIMOS]] (University of Edinburgh)
* [[DEMOS]] (Soviet Union)
* [[Duress (operating system)|Duress]] ([[University of Illinois at Urbana–Champaign]]/[[Datalogics]])<ref name="village.org" />
* LOS/C, a small unitasking system written by BRL for the BRL routers and the I/O controller for the Denelcor HEP
* [[Multi-Environment Real-Time|MERT]]<ref name="village.org" />
* [[Micropower Pascal]]<ref name="village.org" />
* [[MK-DOS]]
* [[MONECS]]
* [[Multi-Tasking System|MTS]] (Multi-Tasking System written in [[RTL/2]] by SPL)<ref name="village.org" />
* [[MUMPS]]
* [[MUSS-11]]
* PC11 (Decus 11-501/[[Pilkington]])<ref name="village.org" />
* polyForth, Forth Inc.'s [[Forth (programming language)|Forth]] for the PDP-11
* ROSTTP (Realtime Operating System for Terminal Teletype Processing/Simpact){{citation needed|date=January 2011}}
* SHAREeleven, SHAREplus
* Solo by [[Per Brinch Hansen]]<ref name="Solo">{{Citation|last=Brinch Hansen|first=Per|title=The Solo Operating System: A Concurrent Pascal Program|year=1976|url=http://brinch-hansen.net/papers/1976b.pdf|access-date=22 June 2011|archive-date=25 July 2011|archive-url=https://web.archive.org/web/20110725215859/http://brinch-hansen.net/papers/1976b.pdf|url-status=live}}</ref>
* [[Sphere (operating system)|Sphere]] (Infosphere – Portland Oregon 1981–87)<ref name="village.org" />
* [[Softech Microsystems]] [[UCSD System]] with [[UCSD Pascal]]<ref name="village.org" />
* [[TRIPOS]]
* [[TSX-Plus]]
* [[Unix]]<ref name="byte198308">{{cite news |url=https://archive.org/stream/byte-magazine-1983-08/1983_08_BYTE_08-08_The_C_Language#page/n189/mode/2up |title=The History of Unix |work=BYTE |date=August 1983 |access-date=31 January 2015 |pages=188}}</ref>{{r|fiedler198310}} (many versions, including [[Version 6 Unix]], [[Version 7 Unix]], [[UNIX System III]], and [[Berkeley Software Distribution#PDP-11 beginnings|2BSD]])
* [[Xinu]] OS for instructional purposes
* [[Venix]] (implementation/port of Unix developed by [[VenturCom]])<ref name="village.org" /><ref name="hinnant198408">{{cite news |url=https://archive.org/stream/byte-magazine-1984-08/1984_08_BYTE_09-08_Modula-2#page/n137/mode/2up |title=Benchmarking UNIX Systems |work=BYTE |date=Aug 1984 |access-date=23 February 2016 |author=Hinnant, David F. |pages=132–135, 400–409}}</ref>
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