Revised and updated! The internationally bestselling guide to JCL programming for today's enterprise programmers and developers This book helps you take advantage of the current market demand for JCL programmers. Whether you are a member of a Y2K retrofit team, an application manager charged with running secure e-commerce servers off of mainframe data, or a programmer assigned to writing interfaces between a mainframe and a client/server network, there is no faster, easier way to master this difficult programming language. More user-friendly for PC programmers than previous editions, System 390 JCL, Fourth Edition features: * Many new examples focusing on the concerns of PC programmers * New sections on programming in multiplatform environments * Thorough review of changes in the latest versions of JCL and OS/390 * Extensive coverage of JCL in batch programming and production jobs * A separate chapter on obsolete features that can trip up retrofit teams * Chapters on Linkage Editor, IBM utilities, Sort/Merge utility, VSAM, TSO/E, ISPF, and REXX * Helpful chapter-end exercises that you can run on a PC Combining all the features of a tutorial for programmers new to JCL and a handy, everyday programming reference, System 390 JCL, Fourth Edition is truly the "JCL Programmer's Bible.".