The TSO/E Enhanced Connectivity Facility provides a standard way for programs on different systems to share services. With this facility, programs on a properly configured personal computer can obtain services from programs on an IBM® host computer running MVS™. The personal computer programs issue service requests and the host programs issue service replies, which the TSO/E Enhanced Connectivity Facility passes between systems.

The server-requester programming interface (SRPI) of the TSO/E Enhanced Connectivity Facility lets you write PC requester programs to request host services and host server programs to service the requests and return replies. Servers and requesters together form Enhanced Connectivity applications.