equipment for radiotelephone or radiotelegraph communication and equipment for transmitting or receiving voice messages, images and other data, including wired or wireless communication equipment (for example, in a local or global communication network), other not included in other groupings
My earliest recollection of HR was as a messenger in a radiotelegraph company that was using dots and dashes to receive and deliver messages nationwide.
The story of METARs and TAFs goes back to the 1940s when weather reports were transmitted over teletype and radiotelegraph in many confusing styles and formats.
Mostly black Brazilian sailors relied on fellow crew members, shipboard operators, to intercept radiotelegraph transmissions sent out by white naval officers and to broadcast their own messages to the people of Brazil during their "revolt of the whip"--a rebellion that nearly overturned the Brazilian state in 1910 (Love, 2012).
radiotelegraph - telegraphy that uses transmission by radio rather than by wire
radiotelegraph - the use of radio to send telegraphic messages (usually by Morse code)