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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
A system for transmitting voices over a distance using wire or radio, by converting acoustic vibrations to electrical signals. -
Radio Nikola Tesla
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 signals, 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 program. -
Tablet Alan Kay
A mobile computing device that has a flat and rectangular shape like that of a magazine or a paper notebook, which is usually controlled by a touch screen, and is typically used to access the internet, watch videos, play games, read books electronics, etc. -
Mobile phone Martin Cooper
A telephone with access to a cellular radio system so it can be used over a wide area, without a physical connection to a network.
