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The “Invisible Web,” that part of the World Wide Web that is not commonly searched by our standard search engines such as Google or Bing is estimated by the Library of Congress to be close to containing 91,000 terabytes.

Saikat Basu’s article at MakeUseOf.com, quotes a Wikipedia article in which that figure is an increase from close to 3,000 terabytes back in 1997.

When you consider that the ‘open’ web most people take for granted they have access to is only 167 terabytes, one can finally understand how much of the information and web pages on the Internet are closed to us for most of our searches.

MakeUseOf.com’s article tries to help out by shedding the light on some of what they refer to as the Web’s “Dark Continent” -content unindexed by standard Search Engine Spiders like Google.

They list and describe 10 Search Engines that you may want to try the next time you need to do some deep research that a normal, everyday search just can’t seem to dig up.

Here are the 10 resources they recommend getting to know for your research deep diving:

Infomine at http://infomine.ucr.edu/ Scholarly Internet Resource Collections

The WWW Virtual Library at http://vlib.org/ Oldest Catalog on the Web

Intute at http://www.intute.ac.uk/ Esteemed British Resources

Complete Planet at http://aip.completeplanet.com/ Indexes 70,000 Databases

Infoplease (with it’s kid spinoff: Factmonster.com) at http://www.infoplease.com/ Info Portal to Encyclopedias, Almanacs, Biographies, Atlases

DeepPeep at http://www.deeppeep.org/ Beta service indexing databases not normally covered by the standard search engine

IncyWincy at http://www.incywincy.com/ Metasearch engine filtering results of the Invisible Web

DeepWebTech at http://www.deepwebtech.com/ Five Deep Search Engines covering Science, Medicine and Business

Scirus at http://www.scirus.com/srsapp/ Science Research

TechXtra at http://www.techxtra.ac.uk/index.html Engineering, Math & Computing in Industry

(For more details please see the original Full Article athttp://www.makeuseof.com/tag/10-search-engines-explore-deep-invisible-web/ )

Posted via web from Early Adopters on Posterous

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