Google: Google indexes over 2 billion pages and also offers a Subject Directory to search for broad topics. Try the Advanced Search feature to limit your searches by domain and to use guided search boxes to build Boolean Searches for better results.

AllTheWeb indexes over 2 billion pages and is considered to be a close competitor to Google. If you don't get good results from Google, try this search engine next. It allows Advanced Searches with drop down choices of "any of the words," "all of the words," and "the exact phrase."

Teoma produces search results in sub-topic folders and also provides links to related subjects. The Advanced Search feature allows limits by domain (.edu, .gov, .org), date, and other limit features that allows you to refine your search..

Vivisimo is a meta-search engine that searches several search engines at once: MSN, Netscape, Lycos, and Looksmart. Try meta-search engines only when you can't find what you are looking for in the three search engines listed above.