Columbia subject headings:
Artificial satellites in telecommunication--United States.
Competition--United States.
EchoStar (Firm)
MCI Communications Corporation.
Telecommunication cables--United States.
Telecommunication--Mergers--United States.
Harvard subject headings:
Artificial satellites in telecommunication--United States.
Competition--United States
EchoStar (Firm)
MCI Communications Corporation.
Telecommunication cables--United States.
Telecommunication--Mergers--United States.
Princeton subject headings:
Artificial satellites in telecommunication--United States.
Competition--United States.
EchoStar (Firm)
MCI Communications Corporation.
Telecommunication cables--United States.
Telecommunication--Mergers--United States.