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File Number 8360-36
Order No. GY24-50l7-l2




Introduction to DOS Logic


Program Number 360N-CL-4S3

This reference publication gives an overall view of the
Disk Operating System (008), and it briefly describes
the associated control and service programs.

It is intended for persons who are involved in program
maintenance and for system programmers who are altering
the program design. Program logic information is not
needed for normal use or operation of the system control
program.

This manual is designed to introduce and to
cross-reference the six companion PLMs of the Disk
Operating System. These associated PLMs are listed in
the Preface of this manual.

For titles and abstracts of other associated
publications, see the IBM System/360 and System/370
Bibliography, GA22-6822.




DOS Release 26
I Thirteenth Edition (October 1971)


This publication was formerly titled IBM System/360 Disk
Operating System: Introduction to System Control Programs.
Although titles of some DOS publications (including this one)
have been simplified, the change does not affect the contents
of the publications.

This edition applies to Release 26 of the IBM Disk Operating
System and to all subsequent releases until otherwise
indicated in new editions or Technical Newsletters. Changes
are continually made to the specifications herein; before .
using this publication in connection with the operation of
IBM systems, consult the latest System/360 and System/370 SRL
Newsletter, GN20-0360, for the editions that are applicable
and current.

This edition is a major revision of, and obsoletes,
GY24-5017-11.


Summary of Amendments

This edition provides documentation changes for: