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'''Real-Time Multiprogramming Operating System''' ('''RTMOS''') was a 24-bit [[process control]] [[operating system]] developed in the 1960s by [[General Electric]]<ref name=":0">{{cite book|url=https://archive.org/details/bitsavers_gePAC4000P0PgmgManOct67_6687740/mode/1up|title=GE-PAC 4020 Programming Manual|page=5|year=1967|publisher=[[General Electric]]|accessdate=2013-09-27}}</ref> that supported both [[real-time computing]] and [[multiprogramming]].<ref name=Spang1972>{{cite journal|last=Spang|first=H. A. III|title=The structure and comparison of three real-time operating systems for process control|journal=Automatica|date=January 1972|volume=8|issue=1|pages=49–64|doi=10.1016/0005-1098(72)90009-X|url=http://dl.acm.org/citation.cfm?id=2244947|accessdate=23 August 2013|url-access=subscription}}</ref><ref name="Spang 1974">{{cite conference|last=Spang|first=H. A. III|title=Measurement and Improvement of Memory Allocation in a Process Computer|conference=4th IFAC/IFIP International Conference on Digital Computer Applications to Process Control|year=1974|volume=93|pages=236–247|doi=10.1007/978-3-642-65796-2_20}}</ref> Programming was done in assembly language or Process [[FORTRAN]]. The two languages could be used in the same program, allowing programmers to alternate between the two as desired.<ref name=":0" />

Multiprogramming operating systems are now considered obsolete, having been replaced by [[computer multitasking|multitasking]].{{citation needed|date=December 2015}}

==References==
{{reflist}}

[[Category:General Electric]]
[[Category:Real-time operating systems]]

{{operating-system-stub}}

Real-Time Multiprogramming Operating System - Revision history

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