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Telegraph
The Telegraph is a system for transmitting messages from a distance along a wire, especially one creating signals by making and breaking an electrical connection. It was invented by Samuel Finley. -
Telephone
The Telephone is a system for transmitting voices over a distance using wire or radio, by converting acoustic vibrations to electrical signals. It was invented by Graham Bell. -
Radio
The radio is the transmission and reception of electromagnetic waves of radio frequency, especially those carrying sound messages. It was invented by Nikola Tesla and Guglielmo Marconi. -
Television
The television is 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. It was invented by John Logie Baird. -
Computer
The computer is an electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program. It was invented by Konrad Zuse. -
Tablet
tablet, is a mobile device, typically with a mobile operating system and touchscreen display processing circuitry, and a rechargeable battery in a single, thin and flat package. It was invented by Alan Kay. -
Mobile Phone
The mobile phone is 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. It was invented by Martin Cooper.
