Columbia subject headings:
Telecommunication equipment industry--Mergers.
Telecommunication--United States.
Telephone systems--Mergers.
Harvard subject headings:
Antitrust law--United States
Telecommunication equipment industry--Mergers--United States.
Telecommunication equipment industry--United States--Consolidation.
Telecommunication--United States
Telephone companies--United States--Consolidation.
Telephone systems.
Telephone--Mergers--United States.
Princeton subject headings:
Antitrust law--United States.
Telecommunication equipment industry--United States--Consolidation.
Telecommunication--United States.
Telephone systems.
Telephone--Mergers--United States.