Introduction

This book describes the functional areas (or components) into which CICS® is divided. To understand more about a particular functional area, use the contents list and the index to find the appropriate information.

If you are using this book to diagnose a system problem, to find out whether a function is working as designed, you should also consult the special topic, administration, or programming books in the CICS Transaction Server for z/OS® library.

In this and other CICS books, the word "component" is used in a general way to refer to any unit of code that performs an identifiable set of functions and manages a certain type of data.

Some CICS components are shipped as object code only (OCO). If the component causing a problem is OCO, it is the responsibility of IBM® to diagnose the problem further. If the component is not OCO, you can refer to the source code on microfiche, and use the detailed information in this book to identify more specifically the cause of the problem. The CICS directory shows which CICS object modules are regarded as OCO; no source code is available for these modules.

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