BPA Worldwide is a full-service media-auditing organization that conducts consumer and business media audits for media owners and buyers. The organization serves clients throughout the world. It was founded in 1931 by a group of advertisers, publishers and agencies. The organization is an independent nonprofit institution. BPA Worldwide serves more than 2,500 media properties that include consumer magazines and newspaper. It also serves over 100 Web sites and nearly 2,600 advertising agencies. The organization reports paid and controlled circulation data for business and consumer publications. In addition, it conducts audits for e-mail newsletters and events. BPA Worldwide provides online resources for media buyers.