Estimates based on extrapolations from a study done at University of California, Berkeley in the year 2001[3] , speculate that the deep Web consists of about 91,000 terabytes. By contrast, the surface Web (which is easily reached by search engines) is about 167 terabytes[dubious – discuss]; the Library of Congress, in 1997, was estimated to have 3,000 terabytes.[4] More accurate estimates are available for the number of resources in the deep Web: He et al. detected around 300,000 deep web sites in the entire Web in 2004,[5] and, according to Shestakov, around 14,000 deep web sites existed in the Russian part of the Web in 2006.[6]ja
This post was edited by jspogmg on Jan 5 2012 12:02pm