World Wide Web, Hieroglyphics, Semaphore, Instant messaging, Shortwave radio, Mobile phone, Newspaper, Pamphlet, Poster, Smoke signal, Telegraph, Live streaming, Television, Telephone, Cave painting, Pictograph, Gesture, Sign language, Light signal, Typewriter, Citizens band radio, Morse code, Homing pigeon, Airmail, Surface mail, Short message service, Telex, Fax machine, Internet, Pager,

"Communication Technology"

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