Job Entry 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.
Last updated: 1996-03-23
Nearby terms:
job ♦ Job Control Language ♦ Job Entry System ♦ Jobs ♦ job security
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