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Computer, Charles Babbage
A computer is a programmable device that stores, retrieves, and processes data. -
Telegraph, Samuel Morse
Any device or system that allows the transmission of information by coded signal over distance. -
Telephone, Antonio meucci
A telephone is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly. -
Radio, Guglielemo Marconi
Radio is sound communication by radio waves, usually through the transmission of music, news, and other types of programs from single broadcast stations to multitudes of individual listeners equipped with radio receivers. -
Television, Charles Jenkins
An electronic system of sending images and sound over a wire or through space by devices that change light and sound into electrical signals and then change these back into light and sound. -
Tablet, Stanislaw Lem
A tablet is a touch screen device that resembles a very large smartphone. -
Mobile phone, Martin Cooper
Is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area.