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Computer, Charles Babbage
A computer is an electronic system used to store and process data. The computer takes data from the outside (through the input units), stores it in its memory, processes it and sends it to the operator (through the output units). -
Telegraph, Joseph Henry
An electric telegraph was a point-to-point text messaging system. -
Telephone, Alexander Graham Bell
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 Bird
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
Tablets or tablets use a touch-sensitive screen so you can quickly type and navigate. They are characterized by being very light and are cheaper than a computer. In addition, they are more practical, since all their handling is done with the fingers. -
Mobile Phone, Martin Cooper
A mobile phone or cell 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.