IBM s/390 manual Introduction

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Chapter 1. Introduction

Netfinity/EFS and ThinkPad/EFS systems are entry-level S/390 products. Implementation, involving underlying PC Server (or ThinkPad) hardware and S/390 emulation software, differs considerably from earlier machines. The EFS portion of the name is derived from “Enabled For S/390.”

EFS systems may be used to run OS/390 (and z/OS1), VM/ESA (and z/VM), VSE/ESA, and Linux for S/390. They may also be used for older versions of these operating systems. This document addresses only OS/390 and z/OS (31-bit mode) use, but the reader should not infer that the EFS is limited to OS/390 and z/OS.

Rather than constantly write “OS/390 and z/OS (31-bit mode)” we tend to simply mention OS/390 unless there is a particular point to be made about z/OS. You should assume that this book refers to both OS/390 and z/OS.

1z/OS (31-bit mode) is supported in the latest release for FLEX-ES. Much of the work for this redbook was done before this latest release was available. We expect no significant differences to the redbook contents if you are using z/OS.

© Copyright IBM Corp. 2001 1