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Computer by Charles Babbage
A computer is a machine or device that performs processes, calculations and operations based on instructions provided by a software or hardware program. -
Telegraph by Samuel Morse
It's any device or system that allows the transmition by coded signal over distance. -
Telephone by Antonio Menucci
It's a telecommunication device used to have a conversation between two o more people. -
Radio by Guglielmo 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 by John Logie Baird
It's a system of transmission of images and sounds used for entertainment. -
Tablet by Alan Kay
A tablet is a wireless, portable personal computer with a touchscreen interface. -
Mobile phone by Martin Cooper
Mobile phones are used for a variety of purposes, such as keeping in touch with family members, for conducting business, and in order to have access to a telephone in the event of an emergency.