-
TELEGRAPH-David Alter
A system for transmitting messages from a distance along a wire, especially one creating signals by making and breaking an electrical connection. -
TELEPHONE-Alexander Graham Bell
A system for transmitting voices over a distance using wire or radio, by converting acoustic vibrations to electrical signals. -
RADIO-Guillermo Marconi
The transmission and reception of electromagnetic waves of radio frequency, especially those carrying sound messages. -
TELEVISION-Philo Farnsworth
System of transmission of images and sounds at a distance by means of Hertzian waves. -
COMPUTER-Konrad Zuse
An electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program. -
TABLET-Alan Kay
It is a laptop larger than a smartphone, integrated in a touch screen with which you interact primarily with your fingers without the need for a physical keyboard or mouse. -
MOBILE PHONE-Martin Cooper
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.
