Yahoo! was found by Jerry Yang and David Fifo, who began exploring the Internet as a hobby after finishing their doctoral theses in electrical engineering at Stanford University. In April 1994, they created a directory to keep track of their personal interests on the Internet.
Gradually, they began to spend more and more time on their directory. Later, Yang and Filo
started categorizing Web sites as a way to keep track of aU the sites they had visited. They
posted this list on the Web as "Jerry and David's Guide to the Worldwide Web.