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File No. S360-20
GC28-6535-7
Systems Reference Library
IBM System/360 Operating System:
.Concepts and Facilities
This publication describes the basic concepts
of the IBMSystem/360 Operating System (the
operating system) and guides the programmer in the
use of its facilities.
The operating system is a comprehensive set of
language translators and service programs
operating under the supervision and coordination
of an integrated control program. It assists the
programmer by extending the performance and
application of the computing system.
I Information concerning Model 195 support is for
planning purposes only.
Preface
This publication introduces the facilities The emphasis in thi~ book is on what
of the IBM System/360 Operating system, and elements are contained in the operating
explains how they work together. system and how these elements work
together.
The first section is a general
discussion designed to familiarize you with
operating system concepts and terminology.
A section on designing programs is followed PREREQUISITE PUBLICATION
by detailed discussions of the three main
operating system functions. Language IBM System/360 Operating System:
translator facilities are compared, and Introduction, GC28-6534
examples illustrating the efficient use of
the system are given. The two final This publication describes the general
sections discuss ~ecovery management and organization, function, and application of
mUltiprocessing. A summary of the the operating system. It also introduces
publication and a glossary of new terms are other related publications and describes
included at the end of the publication. their contents.
Seventh Editi6n (June, 1970)
This is a major reV1S1on of, and obsoletes, GC28-6535-5.
Information added for this new edition includes: extensions
to System Management Facilities; Alternate Path Retry and
Dynamic Device Reconfiguration; Operating System Volume
Statistics; Remote Job Entry; 7094/Model 85 Integrated
Emulator; MFT with subtasking; a new system utility program,
IEHATLAS; in-stream procedures; direct system output writers;
handling of machine malfunctions on the Model 195 by SER
routines (Model 195 information is for planning purposes
only); Channel-Check Handler Dynamic Loading; SER1 Wait State
support; new sections on the Error Recovery Procedures and
the OLTEP programs, and the STAE and SPIE macro instructions;
corrections to FORTRAN H data management capabilities. The
document should be reviewed in its entirety. Other changes
to the text, and small changes to illustrations, are indi-
cated by a vertical line to the left of the change; changed
or added illustrations are denoted by the symbol