Vivisimo, Inc. unveiled a free online service that automatically categorizes the search results from FirstGov.gov – the U.S. Government’s official web portal. Vivisimo’s new service helps citizens find government information quickly and easily by organizing FirstGov search results into meaningful subject categories. FirstGov provides a comprehensive search of government information including over 51 million web pages from federal and state governments and U.S. territories. A FirstGov search can produce 1000 or more search results in a long ranked list. Vivisimo’s automatic document clustering technology improves the FirstGov search and helps users sort through the results.