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THE TELEGRAPH
The telegraph was created by Samuel Morse.
He invented the Morse Code. -
Multiplexing
Multiplexing is the technique of combining two or more signals, and transmitting them by a single transmission medium. -
THE FIXED TELEPHONE
Antonio Meucci (1856) Graham Bell (1876) -
RADIO
It was create by J.C. Maxwell and H. R. Hertz.
The radio is a communication system that allows the transmission of signals remotely through radio waves. -
MOBILE PHONE
The mobile phone was created by Martin Cooper.