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Computer, Charles Babbage
A computer is an electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program. -
Telegraph, David Alter
A telegraph is a system for transmitting messages from a distance along a wire, especially one creating signals by making and breaking an electrical connection. -
Telephone, Alexander Graham Bell
A telephone is a system for transmitting voices over a distance using wire or radio, by converting acoustic vibrations to electrical signals. -
Radio, Guillermo Marconi
A radio is the transmission and reception of electromagnetic waves of radio frequency, especially those carrying sound messages. -
Television, John Logie Baird
A television is a system used to transmit visual images and sound that are reproduced on screens. -
Mobil phone, Martin Cooper
A 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. -
Tablet, Jeff Hawkins
A tablet is a wireless, portable personal computer with a touchscreen interface.