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A computer is an electronic device that manipulates information, or data. It has the ability to store, retrieve, and process data. -
Telegraph is a system of sending messages over long distances, either by means of electricity or by radio signals. -
The telephone is a electrical system of communication that you use to talk directly to some else in a different place. -
Radio is a wireless transmission and reception of electric impulses or signals by means of electromagnetic waves. -
An electronic system of transmitting transient images of fixed or moving objects together with sound -
A mobile phone is a wireless handheld device that allows users to make and receive calls. Are used for a variety of purposes, such as keeping in touch with family members, for conducting business... -
A tablet is a type of laptop, usually larger than a smartphone, that has a touch screen with which to interact without the need for a keyboard or mouse
