This IBM Redbooks publication is Volume 2 of a five-volume set that is designed to

introduce the structure of an OS/390 and S/390 operating environment.

The set will help you install, tailor, and configure an OS/390 operating

system, and is intended for system programmers who are new to an OS/390

environment.

Chapter 1 provides an introduction to OS/390 implementation and daily

maintenance, and how to IPL an OS/390 system. Described are the main

parameters and system data sets necessary to IPL and run an OS/390

operating system and the main daily tasks that a system programmer

performs in order to maximize the advantages that a well implemented

operating system can offer to your I/T structure.

Chapter 2 describes subsystems and how to define them.

Chapter 3 describes the two job entry subsystems, JES2 and JES3.

Chapter 4 describes what factors should be considered when placing

load modules or load libraries into storage.

Chapter 5 describes how data sets are managed in a catalog structure

and the various types of catalogs.