This is an updated version of a hands-on guide to the IBM AS/400 computer, reviewed by IBM staff members. It aims to provide users with everything they need to integrate AS/400 systems into the business environment. It includes detailed coverage of the basics - hardware, architecture, storage management and performance - and explains how to maximize the unifying power of AS/400 systems and integrate them into existing IBM systems. The text also describes how the available models, expansion options and peripherals - as well as the operating systems and application software - fill different business needs. The text concludes with a look at the key planning issues such as security, lease versus purchase, physical planning, software compatibility and migration from the 3X systems.