This document discusses computer output devices. It describes video display units (VDUs)/monitors which are used to display processed information for the user. Popular types are color or monochrome screens. Printers are also discussed as output devices that produce hard copies. Printers are categorized by technology into impact (e.g. dot matrix) and non-impact (e.g. laser, inkjet). Plotters are another type of output device used to produce graphs and designs on paper.