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File Number S360-50
Order No. GC24-5073-2 DOS
Systems Reference Library
DO'S System Programmer's Guide
This reference publication is intended primarily
for the system programmer who is involved in
making decisions relating to the components of the
installation's supervisor, file organization and
program design. To form a single publication,
this manual brings together and expands upon
information from many sources. Major topics
discussed are:
1. Supervisor Planning Concepts
2. Data Management
3. Program Design
4. Debugging Aids
For each major section, the Preface lists the most
closely related publications. For a complete list
of available publications, see the IBM System/360
and System/310 Bibliography, GA22-6822.
Third Edition (September 1971)
This publication was formerly titled IBM System/360 Disk
operating System: System Programmer's Guide. Although
titles of some DOS publications (including this one) have
been simplified, the change does not affect the contents of
the publications.
This edition replaces and obsoletes GC24-5073-1. Changes are
continually made to the specifications herein; before using
this publication in connection with the operation of IBM
systems, consult the latest System/360 and System/370 SRL
Newsletter, GN20-0360, for the editions that are applicable
and current.
summary of Amendments
For a list of changes made in this edition, see page 3.
Changes or additions to the text and illustrations are
indicated by a vertical line to the left of the change.
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
I addressed to IBM Laboratory, Publications Dept., P.O. Box 24,
Uithoorn, Netherlands.
@ Copyright International Business Machines Corporation 1969, 1970, 1971
Summary of Amendments
for GC24-S073-2
NEW FUNCTIONS