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telegraph- Samuel Morse
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
A system for transmitting voices over a distance using wire or radio,by converting acoustic vibrations to electrical signals -
Radio-Guglielmo Marconi
The transmission and reception of electromagnetic waves of radio frequency,especially those carrying sound messages -
Television- Philo Taylor Farnsworth
A system for converting visual images (with sound) into electrical signal, transmitting them by radio or other means, and displaying them electronically on a screen. -
Computer- konrad zuse
An electronic device for storing and processing data,typically in binary form, according to instructions given to it in a variable progam -
Mobile Phone- Martin Cooper
A telephone with acess to a cellilar radio system so it can be used over a wide area, without a physical connection to a network -
Tablet-Microsoft/ Bill Gates
Is a mobile device,typically with a mobile operating system and touchsreen display processing circuitry,and reachargeable battery in a single, thin and flat package
