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: Describes the data sets (files) used by the programs, linking logical names in the code to physical storage on the mainframe. JCL in Development Environments

: Specifies the program or procedure to be executed (the "step").

: Managing mainframe storage often involves transferring Direct Access Storage Device (DASD) data to local workstations using tools like binary FTP or CCKD converters for use in emulators like Hercules . jcl/jcl/source/common/JclResources.pas at master - GitHub