With nearly 4,000 members in North America, ABC is a forum of the world's leading magazine and newspaper publishers, advertisers and advertising agencies. The organization provides credible, verified information essential to the media buying and selling process. ABC maintains the world's foremost online database of audited-circulation information and a growing array of readership, audience and Web site usage data. ABC's digital arm, ABC Interactive, is one of the world's leading independent auditors of Web sites and digital ad-based technology, performing thousands of audits since its inception in 1996.