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University of Michigan Executive System

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Title: University of Michigan Executive System  
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University of Michigan Executive System

University of Michigan Executive System
Developer University of Michigan
Written in Assembler
Working state Historic
Initial release 1958
Available in English
Platforms IBM 704, 709, 7090


The University of Michigan Executive System, or UMES, a batch operating system developed at the University of Michigan in 1958, was widely used at many universities. Based on the General Motors Executive System for the IBM 701, UMES was revised to work on the mainframe computers in use at the University of Michigan during this time (IBM 704, 709, and 7090) and to work better for the small student jobs that were expected to be the primary work load at the University.

UMES was in use at the University of Michigan until 1967, when MTS was phased in to take advantage of the newer virtual memory time-sharing technology that became available on the IBM System/360 Model 67.

Programming languages available

See also

External links

  • University of Michigan Executive System for the IBM 7090 Computer, volumes 1 (General, Utilities, Internal Organization), 2 (Translators), and 3 (Subroutine Libraries), Computing Center, University of Michigan, September, 1965, 1050 pp.
  • Unisys History Newsletter, Volume 1, Number 3, March 1993 (revised 1999)
  • The IBM 7094 and CTSS, Tom Van Vleck
  • University of Michigan Executive System (UMES) subseries, Computing Center publications, 1965-1999, Bentley Historical Library, University of Michigan, Ann Arbor, Michigan
  • "A Markovian model of the University of Michigan Executive System", James D. Foey, Communications of the ACM, 1967, No.6
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