Google
Enables users to search the Web, Usenet, and images. Features include PageRank, caching and translation of results, and an option to find similar pages.
http://www.google.com

Search Gov
Government Resource Search Engine to find United States government information.
http://www.searchgov.us

Yahoo!
The first large scale directory of the Internet, now a major portal offering search engine results, customizable content, chatrooms, free e-mail and more.
http://www.yahoo.com