Preferred label
Communication devices
Broader term
Equipment
Narrower terms
Beacons
Bulletin boards
Buoys
Cellular telephones
Facsimile transmissions
Horns (Communication devices)
Hotlines (Communication)
Intercommunication systems
License plates
Megaphones
Phonographs
Public address systems
Radiophones
Radios
Scoreboards
Signal flags
Signal lights
Signals
Telecommunication cables
Telecommunication lines
Telegraph
Telephones
Televisions
Related terms
Bells
Bugles
Communication
Communication facilities
Pneumatic tubes
Change note
Formerly TGMI term.