Web directories use people to review and categorize sites. A search engine indexes all pages with keywords, not just the home pages of Web sites. A compiled list integrates all of the matches to eliminate duplicates. It ranks all of the matches at once. A sequential list separates the results by each search service.
Most search services list the results with the most relevant match first.
Multi-search services either compile a master results list or group results by each search service. They are Boolean Operators used in advanced searches to narrow the results. Web directories are most selective and search engines are most inclusive . Multi-search services chose the top matches from a variety of services. Copyright 1999, American Association of Retired Persons and WorldLink Learning.