Abstract: A system for searching the Internet for a document, comprises at least one computer system including, a first data repository, a second data repository and a processor. The first repository of data represents an organization of documents provided in response to frequency of terms found in individual documents. The second repository of data represents topics, with an individual topic being associated with, (a) a set of documents in the first repository and (b) a related topic. A processor is configured to, in response to a received search term, use the first and second repositories to identify search result documents in the organization of documents including documents from a first set of documents associated with the individual topic and a second set of documents associated with the related topic.