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Telegraph- David Alter
A system for transmitting messages from a distance along a wire, especially one creating signals by making and breaking an electrical connection. -
Telephone-Graham Bell
Is an apparatus, system, or process for transmission of sound or speech to a distant point, especially by an electric device. -
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.
