Reference, Popular Culture, Lifestyle:

Martindale’s Reference Desk (highly recommended) http://www-sci.lib.uci.edu/~martindale/Ref.html

Virtual Search Engines (highly recommended) http://www.virtualfreesites.com/search.html

WWW Virtual Library (highly recommended) http://vlib.org

Allsearchengineshttp://allsearchengines.com

Foundation Center Onlinehttp://fdncenter.org/

Internet Public Library http://www.ipl.org/

First-Searchhttp://first-search.com/

Internet.comhttp://internet.com

NewPageshttp://www.newpages.com/

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Humanities and Social Sciences:

Fossick (highly recommended) http://fossick.com

History Matters (highly recommended) http://historymatters.gmu.edu/

Rutgers University Research Guides: Social Science and Law (highly recommended)
http://www.libraries.rutgers.edu/rul/rr_gateway/research_guides/research_guides.shtml#social_sciences

Voice of the Shuttle(highly recommended) http://vos.ucsb.edu/

WWW Virtual Library (highly recommended) http://vlib.org

Pilot Search (highly recommended) http://www.pilot-search.com

Bloomsbury Research Centre http://www.BloomsburyMagazine.com

Infominehttp://infomine.ucr.edu

Shakesearch http://www.rhymezone.com/shakespeare/

Social Science Information Gateway (UK & Europe) http://sosig.ac.uk/

SocioSite http://www.pscw.uva.nl/sociosite
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Business and Government:

Beaucoup (highly recommended) http://www.beaucoup.com

Rutgers University Research Guides: Business (highly recommended)
http://www.libraries.rutgers.edu/rul/rr_gateway/research_guides/busi/business.shtml

First Gov (highly recommended)     http://firstgov.gov

Business.com http://business.com

EGovLinks http://egovlinks.com

Search.comhttp://search.cnet.com/
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Sciences and Technology:

Fossick (highly recommended) http://fossick.com

Biology Links (highly recommended) http://mcb.harvard.edu/BioLinks.html

Calculators On-line Center (highly recommended) http://www-sci.lib.uci.edu/HSG/RefCalculators.html

Martindale’s Reference Desk (highly recommended) http://www-sci.lib.uci.edu/~martindale/Ref.html

Scirus (highly recommended) http://www.scirus.com

WWW Virtual Library(highly recommended) http://vlib.org/Science.html

Chemfinderhttp://www.chemfinder.com

Infominehttp://infomine.ucr.edu

SciCentralhttp://www.sciquest.com

Scientific Search Engineshttp://www.scientific-search-engines.com/

Sci-TechResourceshttp://www.scitechresources.gov

Search.comhttp://search.cnet.com/

Statpageshttp://members.aol.com/johnp71/javastat.html
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Health Sciences:

Healthfinder(highly recommended)http://www.healthfinder.gov

Martindale’s Health Sciences Guide (highly recommended)
http://www-sci.lib.uci.edu/HSG/HSGuide.html

RxList http://rxlist.com/

Acurianhttp://www.acurian.com/patient/

WWW Virtual Library(highly recommended) http://vlib.org/Medicine.html
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Invisible or Deep Web:

This portion of the Internet consists of information that requires interaction to display, such as CGI scripts, forms, logins, etc. lt is currently estimated to be over 150,000 databases housing 700 billion documents, over 95% or which are publicly available. Crawler-based search engines cannot download these documents, so specialized sources such as these provide the only access.

Metor(highly recommended)http://www.metor.com

Completeplanet http://completeplanet.com

Invisible Web http://www.invisibleweb.com/

Profusion http:/beta.profusion.com
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Miscellaneous:

Disinformationhttp://www.disinfo.com/

Search Engine Alliancehttp://www.searchenginealliance.com/

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Country or Region-Specific:

Beaucoup (highly recommended) http://www.beaucoup.com

Search Engine Colossus (highly recommended) http://www.searchenginecolossus.com/

Finderseeker http://www.finderseeker.com