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GC26-3838-1
File No. 5370-30
OS/VS Virtual Storage
Access Method (VSAM)
Systems Programmer's Guide
VS1 Release 4
VS2 Release 3
Second Edition (February 1975)
This edition replaces the previous edition (numbered GC26-3838-0) and makes that edition
obsolete.
This edition applies both to Release 4 of OS/VS 1 and to Release 3 of OS/VS2, and to all
subsequent releases of either system unless othe.rwise indicated in new editions or technical
newsletters. (Information on enhanced VSAM under OS/VS2 is only for planning
purposes until the availability of the OS/VS VSAM Independent Component Release for
Release 3 of that system.)
Significant system changes are summarized under "Summary of Amendments" following
the list of figures. In addition, miscellaneous editorial and technical changes applicable to
either or both of OS/VS 1 and OS/VS2 have been made throughout the publication. Each
technical change is marked by a vertical line to the left of the change; there are no
significant changes for Release 3 of OS/VS2.
Information in this publication is subject to significant change. Any such changes will be
published in new editions or technical newsletters. Before using the publication, consult the
latest Virtual Storage SUPP.lement (to IBM, System/360 and System/370 Bibliography),
/ GC20-0001, and the technical newsletters that amend the bibliography, to learn which
editions and technical newsletters are applicable and current.
Requests for copies of IBM publications should be made to the IBM branch office that
serves you.
Forms for readers' comments are provided at the back of the publication. If the forms have
been removed, comments may be addressed to IBM Corporation, System Development
Division, LDF Publishing-Department J04, 1501 California Avenue, Palo Alto,
California 94304. All comments and suggestions become the property of IBM.