The command processor provides a standard way for application programs to share services. With this facility, programs on properly-configured IBM® Personal Computers (PCs) can obtain services from programs on IBM host computers. The PC programs issue service requests and the host programs issue service replies, which the TSO/E Enhanced Connectivity Facility passes between the systems.

The PC programs that issue service requests are called requesters, and the host programs that issue replies are called servers. Servers can give PC requesters access to host computer data, commands and resources such as printers and storage. You can write servers to receive service requests, process the requests, and return replies to the requester.

For information on how to write, install, test and debug a server program, see z/OS TSO/E Guide to SRPI.