10 Search Engines to Explore the Deep End of the Invisible Web (lien)

Bases de données dissimulées derrière un moteur de recherche, index de revues et journaux, réseaux privés : des pans entiers d’internet échappent à la gloutonnerie de Google. Il existe néanmoins des moteurs de recherche spécialisés, ils répondront à certaines demandes pointues. L’excellent makeuseof en a référencé dix. Ils sont touts américains :

Search engine technology has progressed by leaps and bounds. Today, we have real time search and the capability to index Flash based and PDF content. Even then, there remain large swathes of the web which a general search engine cannot penetrate. The term, Deep Net, Deep Web or Invisible Web lingers on.

To get a more precise idea of the nature of this ‘Dark Continent’ involving the invisible and web search engines, read what Wikipedia has to say about the Deep Web. The figures are attention grabbers – the size of the open web is 167 terabytes. The Invisible Web is estimaenter your WordPress.com API keyted at 91,000 terabytes. Check this out – the Library of Congress, in 1997, was figured to have close to 3,000 terabytes!

Lire la suite ici