In this book, we use the term CICS® Clients to mean all of the following:
A CICS Client is not a full-function CICS system, but contains code to enable it to access the services of CICS systems. (Services mean things like transactions and programs.) CICS systems to which Clients are connected are known as CICS servers.
Each CICS Client is designed to run on a particular operating system. Each can attach to a common range of CICS systems, using a variety of protocols. CICS Clients thus allow users to access resources owned by CICS server-systems, from a variety of operating environments.
There is a CICS Client for each of the following operating systems:
Each Client can attach to any or all of the following CICS servers: