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job entry system

   Also found in: Acronyms 0.01 sec.
job entry system [′jäb ¦en·trē ‚sis·təm]
(computer science)
A part of the operating system of a large computer system that accepts and schedules jobs for execution and controls the printing of output.

(operating system)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.


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