Output devices are pieces of hardware which provide information and results of data processing in an accessible form. The most common output devices are monitors and printers of various kinds.
The screen is an output device that provides high speed change of display including text, graphics and colour, but does not provide a permanent copy. There are various display technologies – CRT, LCD, plasma screen, OLEDs.
Printers provide output in the form of permanent copy, normally on paper or acetate sheets. There are many types of printers, for example dot-matrix printers, inkjet printers, laser printers, thermal printers, imagesetters, platesetters (CTP), multi-function printers, plotters. They vary in cost, speed, print quality, noise or printing method.
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