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File No. S360-30
Order No. GC30-2003-4 OS




Systems Reference Library




IBM System/360
Operating System
Queued Telecommunications Access Method
Message Processing Program Services

Program Number 360S-CO-S19
PREFACE




This publication is intended for the prob- The first four sections of a companion
lem programmer assigned to write a message publication., IBM system/360 operating Sys-
processing program to support a QTAM- tem: QTAM Message Control Program. GC30-
controlled telecommunications system 2005,. contain general information of inter-
operating under the IBM System/360 Oper- est to the programmer writing a message
ating System. Included is a general dis- processing program, i. e.,. telecommunica-
cussion of message processing programs. tions applications. concepts and
followed by a detailed description of the terminology, and message formats.
services QTAM provides in suppo~t of a mes-
sage processing program. The Q~AM services The prerequisite for a thorough under-
are provided through standard macro- standing of this publication is a basic
language statements such as GET, PUT, OPEN, knowledge of System/360 machine concepts
and CLOSE. and of the System/360 Operating System.




Fifth Edition (June 1971)

This is a major revision of" and obsoletes, C30-2003-3 and
Technical Newsletter GN30-2532. Besides general maintenance
changes. an appendix has been added that contains QTAM error
messages and abend codes.
Significant new material has been added throughoutw and existing
material has been changed extensivelY1 therefore, no vertical
lines or bullets appear in the margins. and the manual should be
reread in its entirety.
Changes are periodically made to the information herein, before
using this publication in connection with the operation of IBM
systems or equipment, refer to the latest SRL Newsletter for the
editions that are current and applicable.
Requests for copies of IBM publications should be made to your
IBM representative or to the IBM branch office serving your
locality.
This ~nual has been prepared by the IBM Systems Development
DiviSion, Publications center" Department E01., P.O. Box 12275.
Research Triangle Park. North Carolina 27709. A form for
reader's comments is provided at the back of this publication.
If the form has been removed" comments may be sent to the above
address. comments become the property of IBM.