What On Earth is a Mainframe

A brief introduction to IBM's zSeries (System z) Mainframe computers and z/OS Operating System. This book gives the basics in clear, fun, easy-to-read English without the jargon.

It includes introductions to CICS, IMS, Websphere and other Mainframe subsystems, as well as Mainframe hardware, why Mainframes are being used, and who works on Mainframes. It also has brief articles on Mainframe people personalities, Mainframe trivia, and why things are the way they are.

An essential book for any Mainframe beginner.