Netzwerkinformationsdienst(A network naming and administration system that was developed by Sun Microsystems and is constructed on the client-server model of computing. Formerly known as Yellow Pages (yp), NIS provides a simple network look-up service that consists of databases and processes)
Netzwerkinformationsdienst-Zuordnung(A database served by Network Information Service (NIS). The NIS lookup calls require a map (database) name and an NIS domain name. An NIS domain consists of a collection of such maps)