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File No. S360-24 ~
DOS
Order No. GC28-6394-6,




I


Systems Reference Library




IBM DOS Pull American
National Standard COBOL

Program Numbers: (Versions 1 & 2) 360N-CB-4B2
(Version 3) 5736-CB2 (Compiler Only)
5736-LM2 (Library Only)
DOSjVS COBOL 5746-CBl (Compiler & Library)
5746-LM4 (Library Only)


This publication gives the programmer the rules for
writing programs that are to be compiled by the IBM
DOS/VS COBOL and IBM Full American National Standard
COBOL compilers under the Disk Operating System. It is
meant to be used as a reference manual in the writing
of IBM Full American National Standard COBOL programs.

COBOL (Cammon Business Oriented Language) is a
programming-language, similar to English, that is used
for commercial data processing. It was developed by
the Conference On DAta SYstems Languages (CODASYL).
The standard of-the-Ianguage is-American National
Standard COBOL, X3.23-1968, as approved by the American
National Standards Institute (ANSI). American National
Standard COBOL is compatible with, and identical to
international standarj ISO/R1989-1972, Programming
Language COBOL.

IBM DOS/VS COBOL and IBM DOS Full American National
Standard COBOL, Version 3, which include all the
features of earlier versions, incorporate tne eight
processing modules defined in the highest level of the
American national stanjard. These modules include:

Nucleus
Table Handling
Sequential Access
Random Access
Sort
Report Writer
segmentation
Library

A significant number of IBM extensions are implemented
as well; these extensions are printed on a shaded
background.
Page of GC28-6394-4, -5, -6 revised 12/03/76 by TNL GN26-0887



PREFACE




This publication describes the IBM COBOL rules and allow for greater
implementation of Full American National programming convenience.
Standard COBOL, and all IBM extensions to
that standard. Some statements are
extensions to either American National All such extensions are printed on a shaded
Standard COBOL or to both American National background for the convenience of users who
Standard COBOL and the complete definition wish strict conformance with the standard.
of CODASYL COBOL. Use of features that are extensions to the
standard may result in incompatibilities
between the implementation represented by
this document and other implementations.
In this publication, the term standard If a complete chapter is a~ extension, only
COBOL means American National Standard the page heading is shaded. These chapters
COBOL; the term IBM Full American National are:
Standard COBOL means this IBM
implementation of American National
Standard COBOL and all extensions to that
standard. There are two types of
extensions:

1. Those that represent features not
specified by American National
Standard COBOL.

2. Those that represent an easing of the
strict American National standard




Seventh Edition (April 1976)

This editiotJ. is a reprint of GC28-6394-5 incorporating changes released in Technical Newsletter
GN26-0801 (dated November 1,1975).

This edition, as amended by Technical Newsletter GN26-0887, describes Version 2 of IBM DOS Full
American National Standard COBOL at the Release 26 level of the Disk Operating System. It also
describes the Program Product Version 3, Release 3, including amended System/370 device support, and
Release 2 of the Program Product DOS/VS COBOL.

Information in this publication is subject to significant change. Therefore. before using this
publication, consult the latest IBM System!360 Bibliography, GC20-0360, and IBM System!370
Bibliography, GC20-000I. and the technical newsletters that amend the bibliography, to learn
which editions and technical newsletters 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.

Forms for readers' comments are provided at the back of the publication. If the forms have
been removed. comments may be addressed to IB!\1 Corporation. P.O. Box 50020, Programming
Publishing, San Jose. California 95] 50. Comments and suggestions become the property of IBM.