This list represents sites that serve that vast majority of search results in the US and Canada. The sites listed include Search Engines, Directories, Portals, ISPs, PPC Engines and Search database providers. The results shown are broken down by category with only the most prominent results provider listed in each category.

Last Updated 02/03

Site: This is the name of the site where the search results are listed (except in the case of Inktomi and Direct Hit which only serve results to other sites).

Main results: These are the results that show up in the body of the first page (and possibly subsequent pages) of results. Sometimes a number of paid listings will show above them.

Paid results: These are results that are paid for by advertisers, generally in a bid model. Paid results sometimes are also the main listings.

Fill results: These are listings that show if after the main results or if no main results exist for a search.

Directory results: These are listings that show in a directory format. Sometimes directory listings are also the main listings.