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May 21, 2002

The Deep Web: Surfacing Hidden Value

This piece was published last summer and was pointed to by today's issue of the "" target="_blank">Distance Educator. It's an interesting followup to the first deep web article from 2000 which estimated that the number of web pages out there is over 500 billion, and that search engines have only indexed 2% of it or so.

The article points out that the deep web, those pages that are generated on the fly by back-end databases, is growing faster than the surface web and that the information contained there is more valuable. There's a list of the top fifty (i.e., largest) deep web sites. Among the more interesting ones:

Think I'll add some of these to my Specialized Search Engines page.