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indexed sequential access method

   Also found in: Acronyms, Wikipedia 0.02 sec.

indexed sequential access method

See ISAM.

(database)Indexed Sequential Access Method - (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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