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of "supervisor", hence a TSO module name of IKJEAxxx, IEB = original functional group of "dataset utilities", hence a TSO module name of IKJEBxxx, etc.).

Facilities

TSO provides several facilities

;Command processors
:TSO provides a variety of command processors, as well as documentation for writing your own.;Terminal Monitor Program (TMP)
:The TMP solicits commands from the user and executes them. IBM originally provided documentation on writing your own TMO;Time sharing
:In OS/360

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