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File Number S360-30
Order Number GY28-6618-5
Program Logic
OS ISAM Logic
Release 21
Program Number 3605-10-526
This publication describes the program logic of the two indexed
sequential access methods: the queued indexed sequential access
method (QISAM) and the basic indexed sequential access method
(BISAM). It also discusses the relationship of indexed sequential
access method routines to other parts of the control program.
Sixth Edition (February 1972)
This is a major revision of, and makes obsolete, the edition of this manual identified as
GY28-6618-4.
This edition applies to OS Release 21 and to all subsequent releases until otherwise indicated
in new editions or technical newsletters. Changes to the information in this book may be
made at any time; before using this publication in connection with the operation of IBM
systems, consult the latest SRL Newsletter, GN20-0360, for the editions that are
applicable and current.
Requests for copies of IBM publications should be made to your IBM representative or to
the IBM Branch Office serving your locality.
Forms for readers' comments are provided at the back of this publication. If the forms have
been removed, comments may be addressed to IBM Corporation, Programming Publications,
Department D78, Monterey and Cottle Roads, San Jose, California 95114. Comments
become property of IBM.