The TSO/E command processor MVSSERV allows IBM® host computers and properly-configured IBM personal computers to communicate. This communication enables personal computer (PC) programs to access a host computer's services, using IBM System/370 to IBM Personal Computer Enhanced Connectivity Facilities (ECF).

The host services are made available to the PC requester programs by corresponding server programs on MVS™. IBM provides several server and requester programs, and you can write servers and requesters of your own.