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Telegraph - David Alter
The telegraph is a device or device that uses electrical signals to transmit coded text messages, such as Morse code, over wire lines or radio communications. -
Telephone - Alexander Graham Bell
The telephone is a telecommunication device designed to transmit acoustic signals at a distance by means of electrical signals. -
Radio - Guglielmo Marconi
Radio is a means of communication that is based on the sending of audio signals through radio waves -
Television - John Logie Baird
A television is a system for the transmission and reception of images and sounds at a distance that simulate movements, which uses a diffusion mechanism. -
Computer - Konrad Zuse
It is a programmable digital machine that executes a series of commands to process the input data, obtaining convenient information that is subsequently sent to the output units. -
Tablet - Alan Kay
It is a portable electronic device larger than a smartphone or a PDA, it is a single piece that integrates a touch screen that emits light and with which it interacts primarily with the fingers or a stylus, without the need for a keyboard physical or mouse. -
Mobile phone - Martin Cooper
It is a portable telephone that can make or receive calls through a radio frequency carrier, while the user is moving within a telephone service area.
