Indexed Sequential Access Method


Also found in: Acronyms.

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.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

ISAM

(Indexed Sequential Access Method) A common disk access method that stores data sequentially, while maintaining an index of key fields to all the records in the file for direct access. The sequential order would be the one most commonly used for batch processing and printing (account number, name, etc.).
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
Mentioned in ?