A World Wide Web subject tree created by David Filo and Jerry Yang of the Department of Computer Science at Stanford University. With a keen eye for the popular as well as the useful, Filo and Yang have created a directory of Web resources that performs a reported 10 million searches across the World Wide Web a week.
The producers of Yahoo are also responsible for Yahooligans", a search tree consisting of the best of Web sites for children or a Yahoo! for kids.
A World Wide Web search tree produced by Yeeeoww Digital Lampoon whose interface is based on and looks almost exactley like Yahoo! the difference being that Yecch! lists links to some of the most bizzare and satirical Web sites on the Internet.