Template:Bell System

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v • d • e Bell System Corporate Operations Holding Company: American Telephone & Telegraph Local Telephone Operations Bell Operating Companies: Bell Telephone Company of Nevada · The Bell Telephone Company of Pennsylvania · The Chesapeake & Potomac Telephone Company · The Chesapeake & Potomac Telephone Company of Maryland · The Chesapeake & Potomac Telephone Company of West Virginia · The Chesapeake & Potomac Telephone Company of Virginia · Diamond State Telephone · Illinois Bell · Indiana Bell · Michigan Bell · Mountain Bell · New England Telephone & Telegraph · New Jersey Bell · New York Telephone · Northwestern Bell · Ohio Bell · Pacific Northwest Bell · Pacific Telephone · South Central Bell · Southern Bell · Southwestern Bell · Wisconsin Telephone Franchisees: Southern New England Telephone · Cincinnati Bell Other AT&T Subsidiaries Manufacturing: Western Electric R&D Operations: Bell Labs Long Distance Services: AT&T Long Lines Wireless Services: Advanced Mobile Phone Service