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File No. S360-29
Form C28-6571-1
Systems Reference Library
IBM Operating System/360
PL/I: Language Specifications
This manual is a description of the full
facilities of PL/I to be implemented under
Operating System/360. However, the reader
should not assume that all facilities will
be available at initial release. Manuals
for specific System/360 implementations
will be released later.
Another publication will be issued spec-
ifying a subset of the facilities of the
language described in this manual. This
subset is planned for implementation under
the Basic Operating System/360 and Basic
Program Support for System/360.
MAJOR REVISION (JULY, 1965)
This publication, Form C28-6571-1, is a major reV1S10n of the previous
edition, Form C28-6571-0. This new edition reflects a number of significant
changes in the language. The sections containing these changes are indicated by
a dot (e) to the left of the subject heading in the Table of Contents.
In addition to the technical changes, certain organizational changes have
been made. Additional chapters (Chapters 5 and 6) have been formed from
material previously contained in Chapter 1. The information on attributes,
declarations, and scope of declarations, also previously contained in Chapter 1,
has been incorporated into Chapter 4.
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.
Copies of this and other IBM publications can be obtained through IBM Branch
Offices.
A form for readers' comments appears at the back of this publication. It may
be mailed directly to IBM. Address any additional comments concerning this
publication to the IBM Corporation, Programming Systems publications, Department
D39, 1271 Avenue of the Americas, New York, N. Y., 10020.
C 1965 by International Business Machines Corporation
CONTENTS
INTRODUCTION 9 Base