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indexed sequential access method
abbr., progr.	ISAM (ssn)
Indexed Sequential Access Method
abbr., IT	ISAM
IT	A disk access method that stores data sequentially while also maintaining an index of key fields to all the records in the file for direct access capability
indexed sequential access method A technique for indexing database records that allows sequential or random access of records. When records are accessed sequentially they are accessed in the order in which they were entered in the database, and when records are accessed randomly, the records are accessed through an index
comp., MS	ISAM (Indexed Squential Access Method)