Understand Internet Search Tools

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Presentation transcript:

Understand Internet Search Tools

How big is the World Wide Web? No one really knows, but we do know that we rely upon search tools to help us find information on the Web. http://www.southcolumbushigh.com/CrystalStubbs/ca1/ca1comp1.htm 1.01 - Internet Search Tools

Two Categories of Search Tools Search Engines Individual search engine Meta-search engine Subject Directories http://www.southcolumbushigh.com/CrystalStubbs/ca1/ca1comp1.htm 1.01 - Internet Search Tools

Individual Search Engines Individual search engines use computer programs called “spiders” to match key search words with the web pages that contain them. Returns a large volume of results Information is not filtered for validity, authenticity, or adult content Results are returned in the form of links to sites that match terms used in the search http://www.southcolumbushigh.com/CrystalStubbs/ca1/ca1comp1.htm 1.01 - Internet Search Tools

Take a look at search engines www.Yahoo.com www.Ask.com www.Google.com http://www.southcolumbushigh.com/CrystalStubbs/ca1/ca1comp1.htm 1.01 - Internet Search Tools

Meta-search Engines Meta-search engines send requests for information to several search engines simultaneously and compile the results. Duplicates are eliminated, thus yielding fewer results Google Custom Search Engine allows the user to select which search engines will be used http://www.southcolumbushigh.com/CrystalStubbs/ca1/ca1comp1.htm 1.01 - Internet Search Tools

Take a look at meta-search engines http://www.dogpile.com http://www.mamma.com http://www.surfwax.com http://www.southcolumbushigh.com/CrystalStubbs/ca1/ca1comp1.htm 1.01 - Internet Search Tools

Subject Directories Developed and maintained by humans to search broad subject categories and their descriptions. More reliable than search engines Provides broad categories of information that allows users to drill down and narrow search results http://www.southcolumbushigh.com/CrystalStubbs/ca1/ca1comp1.htm 1.01 - Internet Search Tools

Subject Directories (Continued) Often used in research by government agencies, medical industries, and educational institutions May be referred to as research databases or searchable databases Results may include non-HTML formats, such as PowerPoints, PDF documents, script, and photographs http://www.southcolumbushigh.com/CrystalStubbs/ca1/ca1comp1.htm 1.01 - Internet Search Tools

Take a look at subject directories http://www.libraryresearch.com http://www.eric.ed.gov/ http://dir.yahoo.com/ http://www.lii.org/ http://www.about.com/ Follow the web links http://www.southcolumbushigh.com/CrystalStubbs/ca1/ca1comp1.htm 1.01 - Internet Search Tools

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