Clever
Aims to find small set of documents the most authoritative information on the requested subject.
- Uses a standard search engine to gather a "root set" of pages matching the query. Next, adds all pages pointing to or pointed to by the root set. Thereafter, it uses only the links between these pages to distill the best authorities and hubs.
See <URL: http://www.almaden.ibm.com/ cs/k53/clever.html>)
AltaVista results include sites selling medical services.
Distinct pages found using Clever
Clever finds the key Baseball sites.