Etymology
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wireless (adj.)
1894, in reference to as a type of telegraph, from wire (n.) + -less. As a noun, "radio broadcasting," attested from 1903, subsequently superseded by radio.
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wi-fi (n.)
1999, apparently from wireless; the second element perhaps suggested by hi-fi.
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radio (n.)

"wireless transmission of voice signals with radio waves," 1907, abstracted or shortened from earlier combinations such as radio-receiver (1903), radiophone "instrument for the production of sound by radiant energy" (1881), radio-telegraphy "means of sending telegraph messages by radio rather than by wire" (1898), from radio- as a combining form of Latin radius "beam" (see radius). Use for "radio receiver" is attested by 1913; sense of "sound broadcasting as a medium" also is from 1913.

That winter, however—the winter of 1921-22—[radio] came with a rush. Soon everybody was talking, not about wireless telephony, but about radio. A San Francisco paper described the discovery that millions were making: "There is radio music in the air, every night, everywhere. Anybody can hear it at home on a receiving set, which any boy can put up in an hour." In February President Harding had an outfit installed in his study, and the Dixmoor Golf Club announced that it would install a "telephone" to enable golfers to hear church services. [Frederick Lewis Allen, "Only Yesterday: An Informal History of the 1920's," 1931]
It is not a dream, but a probability that the radio will demolish blocs, cut the strings of red tape, actuate the voice "back home," dismantle politics and entrench the nation's executive in a position of power unlike that within the grasp of any executive in the world's history. [The Reading Eagle, Reading, Pa., U.S.A., March 16, 1924]

As late as July 1921 the New York Times was calling it wireless telephony, and wireless remained widespread until World War II, when military preference for radio established it as the word. As an adjective by 1912, "by radio transmission;" meaning "controlled by radio" is from 1974. Radio _______ as the proper name of a particular radio station or service, "radio station or service from _______" is by 1920. A radio shack (1946) was a small outbuilding housing radio equipment.

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ack 
British oral code for letter -a- in wireless and telephone communication, 1898; hence ack-ack "anti-aircraft" (gun, fire, etc.). Compare toc (-t-), emma (-m-).
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aerogram (n.)
also aerogramme, 1899, "message sent through the air" (by radio waves, i.e. "wireless telegraphy"), from aero- + -gram. From 1920 as "air-mail letter."
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atmospheric (adj.)
1777, "pertaining to or existing in the atmosphere," from atmosphere + -ic. In a sense of "creating a mood or mental environment" it is from 1908. Atmospherics "disturbances in wireless communication" is from 1905.
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dongle (n.)

small device made to connect to a computer, now especially for use of wireless broadband or protected software, by 1982, perhaps 1980, perhaps suggested by dangle and dong (n.).

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radio (v.)

"transmit by radio," 1916, from radio (n.). Related: Radioed; radioing. An earlier verb in the same sense was marconi (1908), from the name of Italian inventor Guglielmo Marconi (1874-1937), pioneer of wireless telegraphy.

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blackberry (n.)
"fruit of the bramble," early 12c., from Old English blaceberian, from black (adj.) + berry. So called for the color. Also in Old English as bremelberie, bremelæppel (from bramble). The wireless handheld device of the same name was introduced 1999. Related: Blackberrying.
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broadcasting (n.)

1922, verbal noun from broadcast (v.).

Broadcasting, as distinct from wireless communication, may be said to have come into being about 1920. It may be defined as the systematic diffusion, by radio telephony, of music, lectures, drama, humour, news and information bulletins, speeches and ceremonies, pictures and other matter susceptible of appreciation by a scattered audience, individually or in groups, with appropriate receiving apparatus. [Encyclopedia Britannica, 1929]
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