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Telegraph: Samuel Morse
worked by transmitting electrical signals over a wire laid between stations. -
Telephone: Alexander Graham Bell
Communication system that transmits voice and sound over long distances by electrical or electromagnetic means. -
Radio: Guillermo Marconi
Is the broadcasting of programmes for the public to listen to, by sending out signals from a transmitter -
Television: John Logie Baird
A device shaped like a box with a screen that receives electrical signals and changes them into moving images and sound, or the method or business of sending images and sound by electrical signals -
Computer: Konrad Zuse
An electronic machine that is used for storing, organizing, and finding words, numbers, and pictures, for doing calculations, and for controlling other machines -
Tablet: Alan Kay
A mobile computing device that has a flat, rectangular form like that of a magazine or pad of paper, that is usually controlled by means of a touch screen, and that is typically used for accessing the Internet, watching videos, playing games, reading electronic books, etc. -
Mobile phone: Martin cooper
Is a portable device for connecting to a telecommunications network in order to transmit and receive voice, video, or other data.
