AT&T

AT&T Inc. (NYSE: T) is the largest provider of both local and long distance telephone services, wireless service, and DSL Internet access in the United States. The current AT&T, which is based in San Antonio, Texas, United States, is the rechristened SBC Communications, following the purchase of "Ma Bell", AT&T Corporation. As a part of the purchase, SBC shed its name and took on the iconic AT&T moniker and the T stock-trading symbol (for "telephone"). The corporation is considered SBC renamed.

Since the break-up of American Telephone and Telegraph Company in 1984, most of the companies spun off from it (the "Baby Bells") have merged into three major US telecommunications groups: Verizon, Qwest, and what is now AT&T Inc. Most of these companies are made up primarily of former components of American Telephone and Telegraph Company. For the new AT&T, these include many Bell Operating Companies and the long distance division.