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Telegraph
Telegraph is a system of sending messages over long distances, either by means of electricity or by radio signals.
David Alter -
Telephone
Communication system that transmits voice and sound over long distances by electrical or electromagnetic means.
Alexander Graham Bell. -
Radio
It is an electronic device that allows the recovery of voice signals or of any other type, transmitted by a radio transmitter using electromagnetic waves.
Guillermo Marconi. -
Television
System of transmission of images and sounds at a distance by means of hertzian waves.
John Logie Baird -
Computer
An electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program.
Konard Zuse -
Tablet
A tablet, in short, is a laptop larger than a smartphone, but generally smaller than a netbook.
Alan Kay -
Mobile Phone
A telephone with access to a cellular radio system so it can be used over a wide area, without a physical connection to a network.
Martin Cooper.
