Telecommunications refers to long-distance communication (the Greek tele means "far off"). At
present, such communication is carried out with the aid of electronic equipment such as the Radio,
Telegraph, Telephone, and Television. In earlier times, however, smoke signals, drums, light
beacons, and various forms of semaphore were used for the same purpose. The information that is
transmitted can be in the form of voice, symbols, pictures, or data, or a combination of these.