Charles said “According to a study by the University of California at Berkeley, traditional search engines such as Google and Yahoo index only about 0.2% of the Internet. The remaining 99.8%, known as the “deep Web,” is a vast body of public and subscription-based information that traditional search engines can’t access. To dig into this “invisible” information, scientists have developed a new search engine called Infovell geared at helping researchers find often obscure data in the deep Web.”

Charles, there is one thing (maybe more than one!) that I don’t understand about this. I get that there is much information on the web that can be accessed only via subscription. But there are so many such sites that wouldn’t it be prohibitively expensive for a pay-to-search service like Infovell to maintain subscriptions at all these sites? Or do they have some other ways of accessing the information that doesn’t cost them so much money?