A trade association representing 50,000 industry professionals and a nationally coordinated network of advertisers, agencies, media companies, ad clubs and college chapters. Most areas of the site require membership for access.

The national trade association representing the advertising agency business in the United States. Its membership produces approximately 75 percent of the total advertising volume placed by agencies nationwide.

A leading industry organization. Provides mostly proprietary resources so membership is required to access most of the useful portions of their site.

Primary organization for interactive media advertising, including online, Interactive broadcasting, email, wireless and Interactive television media.

A trade association representing the outdoor advertising industry and dedicated to promoting, protecting and advancing outdoor advertising interests in the U.S. Strategic focus is on government relations, marketing, communications, membership, and operati