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telegraph, by Claude Chappe
(especially in the past) a method of sending and receiving messages by electrical or radio signals -
telephone, by Antonio Meucci
A device for speaking to someone in another place by means of electrical signals. -
radio, by Guglielmo Marconi
a piece of electronic equipment used for listening to radio broadcasts -
television, by Charles Francis Jenkins
a device shaped like a box with a screen that receives electrical signals and changes them into moving images and sound, or the method or business of sending images and sound by electrical signals -
computer,by Konrad Zuse
an electronic machine that is used for storing, organizing, and finding words, numbers, and pictures, for doing calculations, and for controlling other machines -
tablet, by Alan Kay
a small, flat computer that is controlled by touching the screen or by using a special pen -
mobile phone,by Martin Cooper
a phone that is connected to the phone system by radio instead of by a wire, and can be used anywhere its signals can be received.