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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. This mass of information represents a potent research resource, no matter what your discipline or interest. Below are some tools to help you mine it. Students and serious researchers may also find our collections of web directories and scholarly and academic research tools and strategies useful.

"Invisible Web & Database Search Engines By Danny Sullivan, Search Engine Watch, Feb 20, 2002"

We specialize in building custom vertical search engines for businesses. Whether you want an enterprise search or content integration solution for your intranet or a white label search engine for your portal or website we have the search solution for you. Find out how our vertical search solutions can deliver content from dynamic pages underlying websites, aka, invisible web, deep web or hidden web.