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Search Engines | Subject Directories

Search Engines

Definition: A program that searches documents for specified keywords and returns a list of the documents or Web pages where the keywords were found. (more ...)

Search Engines

Non-clustered Results

All the Web
AltaVista
Ask Jeeves
Google
HotBot
Looksmart
MSN Search
Teoma

Clustered Results

Clush
Clusty
Exalead
GigaBlast
Grokker
iBoogie
KartOO
WiseNut

A cluster is a group of results that are centered around a common subject. For example, a search for 'Jacksonville' using such a search engine could organize clusters around the following topics: the Jacksonville Jaguars, the City of Jacksonville, Homes, Businesses, and others.

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Meta-Search Engines

These combine the results of multiple search engines.

Dogpile
ixquick
KillerInfo
MetaCrawler
Mooter
Search.Com
WebCrawler

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Portals

Incorporate search engines, and offer additional services.

Excite
Go.com
Lycos
Yahoo!

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Subject Directories

Definition: An Internet research tool on the World Wide Web that organizes Internet resources by subject headings and subheadings. The essential difference between search engines and subject directories is that directories involve humans in selecting, describing and organizing Web resources using selective criteria. (more ...)