This industry comprises establishments primarily engaged in operating Web sites that use a search engine to generate and maintain extensive databases of Internet addresses and content in an easily searchable format (and known as Web search portals) or providing other information services not elsewhere classified. Establishments known as Web search portals often provide additional Internet services, such as email, connections to other Web sites, auctions, news, and other limited content. Illustrative Examples: News clipping services Telephone-based recorded information services Stock photo agencies Web search portals Cross-References. Establishments primarily engaged in--