Searching the invisible web (deep web, hidden web): WebLens search portal - 0 views
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Judy Robison on 28 Feb 11"The terms invisible web, hidden web, and deep web all refer to the same thing: a massive storehouse of online data that the search engines don't capture. That's because terabytes of information are buried in databases and other research resources. Searchable and accessible online but often ignored by conventional search engines, these resources exist by the thousands. Known in research circles as the invisible, deep, or hidden Web, this buried content is an estimated 500 times larger than the surface Web, which is estimated at over four billion pages. "