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The computer is a programmable digital electronic machine that executes a series of commands to process the input data, conveniently obtaining information that is later sent to the output units. -
The telegraph is an apparatus or device that uses electrical signals for the transmission of coded text messages, such as Morse code, through wire lines or radio communications. -
The telephone is a telecommunication device created to transmit acoustic signals at a distance by means of electrical signals. It was created by Alexander Graham Bell -
Radio is a means of communication that is based on sending audio signals through radio waves. -
Television is a system for remote transmission and reception of images and sounds that simulate movements by means of radio waves. It was created by John Logie Baird. -
A tablet is a portable electronic device that is larger than a smartphone. -
The mobile phone is a portable device that can make or receive calls through a radio frequency carrier.