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Telegraph- Samuel Morse
An electric telegraph was a point-to-point text messaging system. -
Computer- Charles Babbage
A computer is an electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program. -
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 a form of telecommunication that is carried out through radio waves or Hertzian waves, which in turn is characterized by the movement of electric fields and magnetic fields. -
Television- John Logie Baird
System of transmission of images and sounds at a distance by means of hertzian waves. -
Tablet- Alan key
A tablet is a small portable computer that accepts input directly on to its screen rather than via a keyboard or mouse. -
Mobile phone- Marin Cooper
A moblie phone is 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.