The COBOL for AIX compiler supports the extended source format as an IBM extension.
Fixed source format consists of the following areas in a 72-character line. Extended source format consists of the following areas in a 252-character line.
Sequence number area
Columns 1 through 6
Columns 8 through 11
Columns 12 through 72 in fixed source format
Columns 12 through 252 in extended source format
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