The JES3 complex
To the operator and to jobs, the JES3 complex appears as a single system, even though it can comprise of several separate and independently-operated systems.
The installation can physically separate the operational functions (card input/output, printing, and tape setup) by locating operator consoles in different physical areas. For example, the card reader/punches and printers can be located in the job dispatching area, mountable input/output devices can be placed in an area that is convenient to the tape and disk library, and an operator console can be placed at the tape or disk librarian's desk to issue library volume requests. Figure 1 diagrams a typical JES3 complex with mains, unit-record and direct-access devices, and teleprocessing equipment.
