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GC28-S730-S
File No. S3S0-36 OS
Systems Reference Library
IB~ System/3GO Operating System:
Release 21.8 Guide
PREFACE
This publication explains the contents and status of
Release 21.8 of the IBM System/360 Operating System.
Release Guides give installation managers, system
programmers, and IBM personnel useful information on
planning for and installing the current release.
This publication has four parts:
1. A functional summary of the items incorporated into
this release.
2. A description of the maintenance activity included in
this release -- APAR and PTF listings.
3. A module directory and a module status listing for
the modules contained in this release.
4. Ordering information -- program material lists,
hardware change levels, and documentation.
To have a history of all APARs, PTFs, and changes to the
system libraries, save your Release Guides.
Seventh Edition (September, 1974)
for Release 21.8
Requests for copies of IBM publications should be made to
your IBM representative or to the IBM branch office serving
your locality.
A form for readers' comments is provided at the back of this
publication. If the form has been removed, comments may be
addressed to IBM Corporation, Publications Development,
Department D58, Building 706-2, PO Box 390, Poughkeepsie, N.Y.
12602. Comments become the property of IBM.
C Copyright International Business Machines Corporation 1971,1972,1973,1974
Memorandum to: Users of Operating System/360
Subject: Distribution of Release 21.8
Release 21.8 may now be ordered for shipment beginning the
week of September 27, 1974.
Content: It contains over 2000 APAR fixes, permanently resolves
over 200 PTFs, and includes the following Component Releases:
Power Warning Feature (PWF) Support
System Modification Program (SMP)
Telecommunications Access Method SE
3803 and 3420 Magnetic Tape Subsystem Support
Component Releases: No Component Releases are planned for
1nstallation on Release 21.8.
Ordering Instructions: The ordering instructions are unchanged
from those of Release 21.7; see Part 4, Section 1.
Distribution Media: The following volume requirements differ
from Release 21.7 to Release 21.8: 2314 magnetic-tape orders
and 2311 disk-pack orders may need one additional volume. Other
volume requirements are unchanged; see Part 4, Section 2.
Symbolic Libraries: Optional symbolic libraries are available
on magnetic tape from PID. Order them from your IBM Marketing
Representative.
Future Releases: Further update releases of the S/360 Operating
System are not planned.
System Generation: Before generating your system, discuss the
latest known restrictions, PTFs, and ECs with your local IBM
Representative. See Part 1, Section 2.
CONTENTS
PART 1: FUNCTIONAL SUMMARY