This IBM Redbooks publication is Volume 1 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.

Volume 1 gives a broad understanding of the software and S/390

architecture and how it is used together with the OS/390 operating

system.

Chapter 1 provides an introduction to the products and components that

make up an OS/390 system.

Chapter 2 describes OS/390 storage concepts.

Chapter 3 describes S/390 hardware and I/O management which includes an

introduction to HCD.

Chapter 4 describes the customization and installation products TSO/E

and ISPF and job control language (JCL).

Chapter 5 describes the OS/390 delivery options and the download process

using ServerPac option.