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A computer is an electronic system used to store and process data. -
A telegraph was a point-to-point text messaging system, used primarily from the 1840s to the late 20th century. -
The telephone is a telecommunication device created to transmit acoustic signals at a distance by means of electrical signals. -
Radio is a means of communication that is based on the sending of audio signals through radio waves -
An electronic device used to receive sound and images which create television programs that people watch. -
The tablet is a portable electronic device larger than a smartphone. -
A mobile phone is a portable device that can make or receive calls through a radio frequency carrier