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visual display unit

noun, Chiefly British Computers.
1.
video display terminal.
Abbreviation: VDU.
Origin
1970-1975
1970-75
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for visual display unit

visual display unit

noun
1.
(computing) a device with a screen that displays characters or graphics representing data in a computer memory. It usually has a keyboard or light pen for the input of information or inquiries VDU
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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visual display unit in Technology
hardware
(VDU, or "video terminal", "video display terminal", VDT, "display terminal") A device incorporating a cathode ray tube (CRT) display, a keyboard and a serial port. A VDU usually also includes its own display electronics which store the received data and convert it into electrical waveforms to drive the CRT.
VDUs fall into two categories: dumb terminals and intelligent terminals (sometimes called "programmable terminals").
Early VDUs could only display characters in a single preset font, and these were confined to being layed out in a rectangular grid, reproducing the functionality of the paper-based teletypes they were designed to replace.
Later models added graphics facilities but were still driven via serial communications, typically with several VDUs attached to a single multi-user computer. This contrasts with the much faster single bitmap displays integrated into most modern single-user personal computers and workstations.
The term "Display Screen Equipment" (DSE) is used almost exclusively in connection with the health and safety issues concerning VDUs.
Working with VDUs - UK Heath and Safety Executive (http://hse.gov.uk/pubns/indg36.pdf).
(2002-11-09)
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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