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job entry system

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Computing Dictionary

Job Entry System operating system
(JES) An IBM mainframe term. There are really two JESs. JES2 is smaller and simpler, and can handle 99.99% of most jobs that run on IBM's MVS operating system. JES3 is much bigger and requires really big iron to run.
(1996-03-23)

The Free On-line Dictionary of Computing, © 1993-2007 Denis Howe
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