• Humans have interacted with the index to organize the information.
• Some search engines create subject directories of rated or reviewed sites.
• Some directories incorporate a search-engine to allow users to find information within the indexed sites.
• Are not comprehensive; useful for filtering searches that yield too many results.
• Visit a Comparison of Health Information Megasites
  http://www.lib.umich.edu/megasite/ for an excellent review of the top twenty-five health directories.

Copyright 1999 by the University of Florida