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Telegraph (Samuel Morse)
A system for transmitting messages from a distance along a wire -
Telephone (Alexander Graham Bell)
The telephone is a telecommunication dispositive created to transmit sound or voice throught electrical signals -
Radio (Guillermo Marconi / Nikola Tesla)
The machine which transmits and receive electromagnetic waves of radio frequency, especially those carrying sound messages. -
Television (John Logie Baird)
Television is a system for transmitting visual images and sound that are reproduced on screens -
Computer (Charles Babbage)
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Tablet (Alan Kay)
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Mobile Phone (Martin Cooper)
A mobile phone is a wireless handheld device that allows users to make and receive calls.