Editing Timeline of operating systems (section)

==1950s==
* 1951
** [[LEO (computer)|LEO I]] 'Lyons Electronic Office'<ref>{{cite web|url=https://www.bbc.co.uk/dna/h2g2/A1000729|title=h2g2 - Early Electronic Computers - Edited Entry|author=Not Panicking Ltd|date=January 7, 2012|access-date=March 15, 2015}}</ref> was the commercial development of [[EDSAC]] computing platform, supported by British firm [[J. Lyons and Co.]]
* 1953
** [[DYSEAC]] - an early machine capable of distributing computing
* 1955
** [[GM-NAA I/O|General Motors Operating System]] made for [[IBM 701]]<ref>{{cite web|url=http://www.csee.wvu.edu/~jdm/classes/cs258/OScat/early.html|title=Early Operating Systems|access-date=March 15, 2015|url-status=dead|archive-url=https://web.archive.org/web/20150410053229/http://www.csee.wvu.edu/~jdm/classes/cs258/OScat/early.html|archive-date=April 10, 2015|df=mdy-all}}</ref>
** [[Massachusetts Institute of Technology|MIT]]'s Tape Director operating system made for [[UNIVAC 1103]]<ref>{{cite web|url=http://www.csail.mit.edu/timeline/timeline.php/timeline.php?query=event&id=3|title=LCS/AI Lab Timeline|access-date=March 15, 2015|archive-url=https://web.archive.org/web/20150923211552/http://www.csail.mit.edu/timeline/timeline.php/timeline.php?query=event&id=3|archive-date=September 23, 2015|url-status=dead|df=mdy-all}}</ref><ref>{{cite book |last1=Ross |first1=Douglas |chapter=A personal view of the personal work station: Some firsts in the Fifties |title=Proceedings of the ACM Conference on the history of personal workstations |date=9 January 1986 |pages=19–48 |doi=10.1145/12178.12180|publisher=Association for Computing Machinery|isbn=0-89791-176-8 |author-link=Douglas T. Ross}}</ref>
* 1956
** [[GM-NAA I/O]] for [[IBM 704]], based on General Motors Operating System
* 1957
** [[Atlas Supervisor]] ([[University of Manchester|Manchester University]])  (''Atlas computer project start'')
** [[BESYS]] ([[Bell Labs]]), for [[IBM 704]], later [[IBM 7090]] and [[IBM 7094]]
* 1958
** [[University of Michigan Executive System]] (UMES), for IBM 704, [[IBM 709|709]], and [[IBM 7090|7090]]
* 1959
** [[SHARE Operating System]] (SOS), based on GM-NAA I/O