This book describes the job control tasks needed to enter jobs into the OS/390 operating system, control the system's processing of jobs, and request the resources needed to run jobs. The book also contains a chapter that describes "started tasks" and how to set them up. To perform job control or started tasks, programmers code "job control statements." This book describes how to code these statements, which include:
- Job control language (JCL) statements
- Job entry control language (JECL) statements, which encompass:
- Job entry subsystem 2 (JES2) control statements
- Job entry subsystem 3 (JES3) control statements
This book is designed as a reference book, to be used while coding the statements. It contains some introductory material. Full explanations of the job control tasks are presented in a companion book, OS/390 MVS JCL User's Guide, GC28-1758.
This book is needed by system and application programmers who enter programs into the operating system. Those using this book should understand the concepts of job management and data management.