The MVS primer (The QED mainframe series)

Explains what operating systems are, why they exist and how the component parts fit together. Provides detailed descriptions of JCL, JES, system flow-chart, access techniques, handling I/O, using the catalog, telecommunications and transaction processing, security, time-sharing services, accounting and monitoring. Includes excellent guidelines on how to learn multiple virtual storage (MVS) and the skills necessary to get the position you desire.