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File Number S360-20
Form C24-34S0-2 BOS




Systems Reference ..Library




IBM System/360
Basic Operating System
Control Programs and Assembler
Operating Guide

Progl'am Numbers
BaEiic Control Program 380B-CL-302
COIllsecutive Processing Macros 380B-IO-303
Indexed Sequential Pile Management
System (ISPMS) Macros 380B-IO-304
Direct Access Method (DAM)
Macros 380B-IO-305
Assembler 380B-AS-309

This publication is divided into three parts:

Part 1 explains briefly the functions of the programs
in the Basic Operating System.

Part 2 gives operating procedures for the IBM System/360
Basic Operating System Control and Service Programs
and Assembler. Procedures for generating a resident
system, and obtaining and using system backup are
included, as well as a section on system/operator
communication.

Part 3 presents the formats of Job Control, Linkage
Editor, and library program control cards.

A series of appendices include reference charts
for System/360 code conversion and a table of IBM-
supplied program and macro names.

For information about the operation of the
System/360, see IBM System/360 Model 30 Operator's
GuidE~, Form A24-3373. Operating guides for other
progl~ams available in the System/360 Basic Operating
SystE~m are in separate publications. For these
and other related publications, see IBM System/360
Bibliography, Form A22-6822. All Basic Operating
SystE~m Operator Messages are cataloged in IBM
SystE~m/360 Basic Operating System, OperatorMessages,
Forni. C24-S024.
PREFACE


Part 1 of this publication presents the con- also given for generating a system, obtain-
cepts of the IBM System/360 Basic Operating ing system backup, and recreating a system
System. The functions provided are ex- from backup.
plained briefly. Persons with a knowledge
of basic operating system concepts may want Part 3 contains the formats of job
to skip this part and refer only to the control cards, Linkage Editor input cards,
sections on operating procedures and error and program control cards (used by library
messages. programs)