CALLFH
Makes the Compiler generate direct calls for all file I/O operations, using the Callable File Handler interface.
CALLMCS
This directive is reserved for internal use by this COBOL system. Because it might appear in the list of settings, it is included for completeness. It is not intended for your use, and its setting should not be changed.
CALLSORT
Defines the program to be called to handle all SORT and MERGE operations.
