Larry Page and Sergey Brin founded Google in 1996 after Larry's supervisor encouraged him to create a web page that linked to other pages. Jerry Yang and David Filo founded Yahoo! in 1994 because they wanted to create a search engine. A meta search is a search tool that sends user requests to multiple search engines and databases. Boolean searches allow users to narrow results using terms like AND, OR, and NOT before search keywords. Google makes money from advertisement on frequently visited pages.