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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. You may already know that you can use a computer to type documents, send email, play games, and browse the Web. -
A telegraph is a communication system that sends information by making and breaking an electrical connection. It is most associated with sending electrical current pulses along a wire with Morse code encoding. -
A telephone is an instrument designed for the simultaneous transmission and reception of the human voice. Telephones are inexpensive and simple to operate, and they offer an immediate, personal type of communication. -
Radio is sound communication by radio waves, usually through the transmission of music, news, and other types of programs from single broadcast stations to multitudes of individual listeners equipped with radio receivers. -
Television is an electronic system of transmitting transient images of fixed or moving objects together with sound over a wire or through space by apparatus that converts light and sound into electrical waves and reconverts them into visible light rays and audible sound. -
Tablets are the most common type of pill. They're an inexpensive, safe, and effective way to deliver oral medication. These units of medication are made by compressing one or more powdered ingredients to form a hard, solid, smooth-coated pill that breaks down in the digestive tract -
Mobile telephone, also called mobile phone, portable device for connecting to a telecommunications network in order to transmit and receive voice, video, or other data.