AT&T Inc. is the largest communications holding company in the United States and worldwide, by revenue. Operating globally under the AT&T brand, AT&T is recognized as the leading worldwide provider of IP-based communications services to businesses and the leading U.S. provider of wireless, high speed Internet access, local and long distance voice, and directory publishing and advertising services. As part of its "three screen" integration strategy, AT&T is expanding video entertainment offerings to include such next-generation television services as AT&T U-verseSM TV.