29-letter words containing g, a, t, h, e, r
- virtual storage access method — (database) (VSAM) An IBM disk file storage scheme first used in S/370 and virtual storage. VSAM comprises three access methods: Keyed Sequenced Data Set (KSDS), Relative Record Data Set (RRDS), and Entry Sequenced Data Set (ESDS). Both IMS/DB and DB2 are implemented on top of VSAM and use its underlying data structures.