Narrow a broad topic
Yahoo! http://www.yahoo.com
Teoma http://www.teoma.com
Google: http://www.google.com
Pinpoint search (full text search not just fields)
Evaluated sites (people look at them)
LookSmart http://www.looksmart.com
About http://www.about.com
Infomine http://infomine.ucr.edu/ (more scholarly information)
Media type
Ixquick: http://wwwixquick.com (mp3)
Scientific Information
What is available on the Internet?
(metaengines, these engines search selected search engines)
Dogpile: http://www.dogpile.com
Vivisimo: http://www.vivisimo.com
Ixquick: http://www.ixquick.com/
Information on a proper noun
(these sites recognize case i.e. upper and lower letters)
The Invisible Web
(those sources not available from regular search engines for a variety of reasons)
Mapped display of results
(requires flash player)
Specialized searches:
Uncle Sam for US government sources only: http://www.google.com/unclesam
For Microsoft related sites: http://www.google.com/microsoft.html
For Apple related sites:
http://www.google.com/mac.html
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