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.

1. Unit 1
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2.  Output Devices
◦ VDU
◦ Printers
◦ Plotters
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3.  hardware components which are used to
display or print the processed information
 displays result of the computer processing
for user.
 The popular output devices are monitor,
printer and speaker (audio response systems)
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4. Computer Application and
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5.  television-like screens that provide the user-
interface in the form of display of text,
numbers and images
 may be monochrome or colour depending on
the type of video monitor and the video
adapter installed in the computer
 The video display terminal (VDT) consists of a
monitor and keyboard
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Management Information System;
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6. Computer Application and
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7.  purely output devices
 produce hard copy output
 Vary in their technologies and capabilities
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8. Printer
Impact Non-Impact
Character Line
Page
Daisy wheel
Dot matrix
Drum
Chain
Laser
Inkjet
Thermal
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9. Computer Application and
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10.  Plotters are used for plotting graphs and
designs on paper.
 Architects and designers use plotters to
produce blueprints of their designs on paper.
 It is a specialised output device for preparing
computer drawn charts and graphs.
 The most popular type of plotter is the flat
bed device. It plots on paper (or other
material) that is spread on a flat bed.
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Management Information System;
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11.  Presentation on:
◦ Types of VDU
◦ Types of Printers
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Management Information System;
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