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Indexed Sequential Access Method

<database> (ISAM) An IBM file management system allowing records to be accessed either sequentially (in the order they were entered) or via an index.

Each index orders the records on a different key.

ISAM was followed by VSAM (Virtual Storage Access Method) and pre-dated relational databases.

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indent style Independent Logical File Independent Verification and Validation index Index Data	ISAM	indices indirect address indirect addressing indirection induction