Category details
CategoryCommunication devices
SourceLibrary of Congress Thesaurus for Graphic Materials I
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- Intercommunication systems
- Hotlines (Communication)
- Telecommunication lines
- Signals
- Scoreboards
- Buoys
- Telegraph
- Phonographs
- Megaphones
- Signal lights
- Radios
- Telephones
- Signal flags
- Horns (Communication devices)
- License plates
- Televisions
- Radiophones
- Bulletin boards
- Beacons
- Public address systems
- Facsimile transmissions
- Telecommunication cables
- Cellular telephones