Job Entry System
Also found in: Acronyms.
job entry system[′jäb ¦en·trē ‚sis·təm]
A part of the operating system of a large computer system that accepts and schedules jobs for execution and controls the printing of output.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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.
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