radiotelephone, telegraph, wireless telegraphy, morse code, guglielmo marconi, telegraph operator, celestial navigation, teleprinter, telephones, semaphore, heinrich hertz, radiocommunication, loran, teletypewriter, radiolocation, typewriting, telephony, paging, xerography, intercommunication, vacuum tube, gyrocompass, steamships, fiberoptics, phonographs, lightwave, modem, fiber optics, phonogram, wireless, frequency modulation, telecommunication, magneto, gramophone, analytic geometry, baud, automata, cordless, sextants, cqd, teletype, aeronautical, bakelite, ciphering, morse, vhf, superheterodyne, linotype, invention, kinetoscope, periscopes, pilotage, windjammer, dialtone, fibre optics, multiplane, boolean algebra, shortwave, buggy whip, hydrofoils, antennas, aether, teletype machine, signal corps, zworykin, cellular, pyrometers, calliope, foghorns, transmissions, telex machine, elocution, electromagnetism, theodolites, wideband, spectrographic, heterodyne, monopoles, opto, camera obscura, horseless carriage, artificer, pneumatics, borescope, dialling, steamboat, jacquard loom, breeches buoy, stereopticon, mimeograph, satcom, grammarian, directional antenna, relativity theory, electromagnetics, pictorialism, annunciator, arrester, multimeter, flambeaux, debarking, monaural, telegraphs, navigation, telephone, broadcasting, switchboard, transportation, haulage, telepathy, trains, transit, transmission, circuits, communications, filming, flights, transoceanic, automated, culture, detecting, electroacoustic, experimental, hertzian, mobile, multiplex, point, sampling, seismographic, telegraphic, wired, wireline, 123, <, accommodative

first baron kelvin, kelvin, radiogram, radiotelegraph, radiotelegraphic signal, radiotelegraphy, simplex, telegraphic signal, william thompson, wireless telegraphy

apparatus, setup