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Q: What is RENAMES clause?
Answer:
RENAMES (66-level) creates alternative groupings of elementary items. 01 REC. 05 FIELD-A PIC X(5). 05 FIELD-B PIC X(5). 05 FIELD-C PIC X(5). 66 FIELDS-AB RENAMES FIELD-A THRU FIELD-B. Provides different data views without memory overhead.