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[Jithin]

Hi All,

The basic structure of PCB block in linkage division is shown as below.

05 DBD-NAME PIC X(8 ).
05 SEG-LEVEL PIC X(2).
05 STAT-CODE PIC X(2).
05 PROC-OPT PIC X(4).
05 RESERVED-AREA PIC S9(5) COMP.
05 SEG-NAME PIC X(8 ).
05 KEY-LEN PIC S9(5) COMP.
05 NO-OF-SENSEG PIC S9(5) COMP.
05 KEY-VALU PIC X(20).

Here what is the purpose of Reserved Area?

[Nic Clouston]

Who knows? It might be spare or it might be something system-ish. Whatever - IBM reckons you do not need to know what it is for and because it is reserved you should leave well alone.
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Utility and Program control cards are NOT, repeat NOT, JCL.