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