z/OS

JES

Also known as: Job Entry Subsystem

Job Entry Subsystem: the z/OS component that receives jobs, queues them for initiators and manages their spooled input and output. Most sites run JES2; a few still run JES3, now offered as JES3plus by Phoenix Software.

See it in context
z/OS fundamentals: How a job becomes running work: JES2

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Related z/OS terms

Abend Address space Classification rules Completion code CSI (consolidated software inventory)Enqueue (ENQ)Execution velocity HOLDDATA