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Telegraph-Samuel Morse
The telegraph uses coded pulses of electrical current through long cables to transmit information. -
Telephone-Alexander Graham Bell
A telephone is a telecommunication system that transmits sound over a long distance by electricity -
Radio-Guglielmo Marconi
Radio, sound communication by radio waves, usually through the transmission of music, news, and other types of programs -
Television-John Logie Baird
is a telecommunication medium used for transmitting moving images in two or three dimensions and sound -
Computer-Konrad Zuse
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. -
Tablet-Alan Kay
It is a type of laptop, larger than a smartphone -
Mobile phone-Martin Cooper
is a portable telephone that can make or receive calls through a radio frequency carrier
