AT&T (disambiguation)

AT&T refers to several related companies providing telecommunications services, including:

• AT&T Corporation, the original AT&T founded 1885 (formerly American Telephone & Telegraph)
• Bell System, known as Ma Bell, AT&T's system of companies that held a monopoly on phone service in the US for most of the 20th century
• Regional Bell Operating Company, known as Baby Bells, the companies formed from AT&T's 1984 split
• AT&T, the current company providing a wide range of telecommunications service and formerly known as SBC
  • See also History of AT&T

AT&T may also refer to:

Telecommunications

• AT&T Corporation, the original AT&T founded 1885 (formerly American Telephone & Telegraph), purchased by SBC in 2005
  • AT&T Information Systems, founded 1982 (formerly American Bell), an unregulated business subsidiary of AT&T Corp.
  • Alascom dba AT&T Alascom, founded 1900 (formerly Washington-Alaska Military Cable and Telegraph System), a long-distance company
• AT&T Labs, founded 1988 (formerly Southwestern Bell Technology Resources), the R&D division of AT&T Inc.
  • AT&T Laboratories, founded 1925 as part of Bell Labs and AT&T Corp., later spun off and now absorbed into AT&T Labs
• AT&T Communications (formerly AT&T Long Lines), an operating company serving the regions of the Bell Operating Companies
  • AT&T CallVantage, a voice-over-internet-protocol service formerly offered by AT&T Corp. and then AT&T Inc.
• AT&T Mobility, the wireless provider subsidiary of AT&T Inc. (formerly Cingular Wireless)
  • AT&T Wireless Services, the former wireless provider subsidiary that became part of Cingular Wireless
• AT&T Technologies, founded 1983, a telephone producer, the postdivestiture successor to Western Electric
• AT&T Broadband, founded 1999 (now part of Comcast), once the largest U.S. provider of cable television services
• Advanced American Telephones, founded 1983, a manufacturer of AT&T branded phones (formerly AT&T Consumer Products)
• Bell Labs, founded 1925 (also called AT&T Bell Laboratories), a Nobel-Prize-winning research and development organization
• Lucent, founded 1983 (now part of Alcatel-Lucent), the primary successor to Bell Labs and AT&T Technologies

Locations

• One AT&T Plaza (Whitacre Tower), headquarters of AT&T Inc.
• AT&T Building (disambiguation), the name of several buildings
• AT&T (SEPTA station), a station on SEPTA's Broad Street Line in Philadelphia

Other

• Aircraft Transport and Travel, a 1910s British airline

See also

• AT&T breakup