Job Control Language (JCL) is the command language of Multiple Virtual
Storage (MVS), which is the commonly used Operating System in the IBM
Mainframe computers. JCL identifies the program to be executed, the
inputs that are required and location of the input/output and informs
the Operating System through Job control Statements. In mainframe
environment, programs can be executed in batch and online modes. JCL is
used for submitting a program for execution in batch mode.
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