Yahoo! is a hierarchical
subject-oriented guide for the World Wide Web and
Internet. Yahoo! lists sites and categorizes them into
appropriate subject categories. Yahoo! may be reached
at "http://www.yahoo.com/". [Source: Yahoo's
"What is Yahoo?"]
Yellow Book or YBTS
Yellow Book Transport
Service; a transport service protocol now rarely used
by the UK academic and research community.
Yellow Pages (YP)
See: Network Information
Yorkshire and Humberside
Metropolitan Area Network.