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computer, Charles Babbage
A computer is a system made up of programs and electronic elements, which together allow processing and ordering information. The programs are known as Software and the electronic elements as Hardware. -
telegraph,Joseph Henry
The telegraph is an apparatus or device that uses electrical signals for the transmission of encrypted text messages through wire lines or radio communications. -
telephone, Antonio Meucci
The telephone is a telecommunication device created to transmit acoustic signals at a distance by means of electrical signals. -
radio, Guillermo Marconi
Radio is the signaling and communication technology using radio waves. Radio waves are electromagnetic waves with a frequency between 30 hertz and 300 gigahertz. -
television, John Logie Baird
Television is a system for the transmission and reception of images and sounds at a distance that simulate movements, which uses a diffusion mechanism. -
tablet, Alan Kay
is a portable electronic device larger than a smartphone -
mobile phone, Martin Cooper
A mobile phone is a portable device that can make or receive calls through a radio frequency carrier while the user is moving within a telephone service area.