Service Manuals, User Guides, Schematic Diagrams or docs for : IBM 360 os R21.0_Mar72 GC26-3746-1_OS_Data_Management_Services_Guide_Rel_21_Feb72

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                                                             File Number S360-30
                                                             Order Number GC26-3746-1




Systems Reference Library




OS Data Management Services Guide

Release 21


This book describes the services provided by the operating system
to allow the programmer to organize data into data sets on auxiliary
storage devices, to read. information from these data sets into main
storage, and, after processing the information, to record it on
auxiliary storage devices.
This book is intended for application programmers who write
assembler-language programs that create and process data sets. It
describes the assembler-language macro instructions used to request
input and output operations. The format of the macro instructions
is explained in as Data Management Macro Instructions,
GC26-3794, which should be used with this book.
In addition to describing the characteristics of data sets and
direct-access storage devices, the book describes the techniques you
can use to process sequential, partitioned, indexed sequential, and
direct data sets.
This book assumes you have a basic knowledge of the operating
system and of assembler language. Two books that contain
information al?out these subjects are as Introduction, GC28-6534,
and as Assembler Language, GC28-6514. It also assumes you
are familiar with job control language, especially the DD statement,
as described in as Job Control Language Reference, GC28-6704.
This book does not discuss macro instructions used for the time
sharing option or for graphics, teleprocessing, optical character
readers, optical reader-sorters, or magnetic character readers.



                                                                                        ~
These macro instructions are discussed in separate publications that
are listed in the IBM System/360 and System/370 Bibliography,                           ......        :
GA22-6822.                                                                               ~"      4 ... 

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