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Computing (FOLDOC) dictionary
Network Information Service
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networking, protocol (NIS) Sun Microsystems' Yellow Pages
(yp) client-server protocol for distributing system
configuration data such as user and host names between
computers on a network.
Sun licenses the technology to virtually all other Unix
The name "Yellow Pages" is a registered trademark in the
United Kingdom of British Telecommunications plc for their
(paper) commercial telephone directory. Sun changed the name
of their system to NIS, though all the commands and functions
still start with "yp", e.g. ypcat, ypmatch, ypwhich.