American Express TRS
American Monitoring Systems, Inc.
American TeleCare, Inc.
American Teleconferencing Services, Ltd
American Telecorp
American Telephone & Telegraph (AT&T)
American Telephone & Telegraph Company AT&T Information Systems Inc.
American Telephone and Telegraph Company
American Telephone and Telegraph Company AT&T Information Systems Inc.
American Telephone and Telegraph Company and AT&T Information Sy
American Telephone and Telegraph Company AT&T Information System
American Telephone and Telegraph Company Communications, Inc.
American Telephone and Telegraph Company, AT & T Laboratories
American Telphone and Telegraph Company, AT&T Bell Laboratories
Americas's Drive-In Corp.
Ameriphone, Inc
Ameriphone, Inc.
Ameritech
Ameritech Communications, Inc.
Ameritech Corp.