AT&T
Bell_Labs
Cingular_Wireless
BellSouth
AT&T_Corporation
Bell_Canada
Bell_System
Southwestern_Bell
Bell_MTS
NYNEX
Pacific_Bell
US_West
Pacific_Telesis
C&P_Telephone
Pacific_Northwest_Bell
South_Central_Bell
Diamond_State_Telephone
Illinois_Bell
Nevada_Bell
Indiana_Bell
Northwestern_Bell
BellSouth_Telecommunications
Verizon_New_England
Wisconsin_Bell