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File Number S360(Mod.20)-3~
Form C26-3806-1




Systems Referen,ce Library




IBM System/360 Model 20
Disk Programming System
Disk Sort/Merge Program

This publication describes the functions and the use
of the Disk Sort/Merg'e Program for the IBM System/360
Model 20. It contains the following information:

1. Minimum machine requirements for sorting or
merging records w'i th this program ..

2. Additional machine features sUpported.

3. Program capabili t.ies .
4. A description of the control statements required
to define sort or merge operations.

5. A description of the facilities provided for
inserting user-written routines into the program.

For a list of associated publications and their
abstracts, see IBM System/360 Model 20 Bibliography,
Form A26-3565.
This manual describes the IBM System/360 reader should be familiar with the publica-
Model 20, Disk Programmin;J System (DPS}, tion IBM System/360 Model 20, Disk Program-
Disk Sort/Merge Program. It includes a ming ~yst~~L-Control and Service Programs,
description of the program, the machine Form C24-9006. Certain Job Control state-
configurations to which the program ment information has been incorporated into
applies, and the format of the control this manual to minimize the need to refer
statements needed to tailor the Disk to other publications.
Sort/Merge Program to a specific job.
If user exits are used, the reader
Amplified details, technical data, pro- should be familiar with the SRL publication
cedures for' program modification, and back- IBM S~stem/360 Model 20, Disk and Tape
ground information are also included. Programming Systems, Assembler Language,
Form C24-9002.
The program operates in conjunction with
the Model 20 DPS Control and Service pro- A ;Jlossary is appended to explain termi-
grams. Therefore, in addition to a working nology used in this publication that may be
knowledge of the System/360 Model 20, the unfamiliar to the reader.




I

Second Edition

This is a major revision of, and obsoletes, C26-3806-0 and TNL N24-90l4.
The publication has been completely rewritten and new material has been
incorporated. Therefore, this edition should be reviewed in its entirety.
Specifications contained herein are subject to change from time to time.
Any such changes will be reported in subsequent revisions or Technical
Newsletters.
This publication was prepared for production using an IBM computer to
update the text and to control the page and line format. Page
impressions for photo-offset printing were obtained from an IBM 1403
printer using a special print chain.
Requests for copies of IBM publications should be made to your IBM
representati ve or to t;he IBM' branch office serving your locality.
A form is provided at the back of this publication for readers'
conunents. If the form has been removed, comments may be addressed to
IBM Laboratories, Programming Publications, 703 Boeblingen/Germany,
P. O. Box 210.
o IBM Germany 1966
~ International Business Machines Corporation 1967
CONTENTS



INTRODUCTION