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visual display unit
(redirected from VDUs)

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visual display unit
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
visual display unit [′vizh·ə·wəl di′splā ‚yü·nət]
(electronics)
display tube
(hardware)Visual Display Unit - (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.
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But there is no evidence to show that VDUs cause disease or permanent damage to the eyes.
Monitor your health; Tips for working with computers by Daily Post (Liverpool, England)
Employers must either give adequate breaks to employees who are using VDUs or ensure that they may work on other activities away from the screen.
Health and safety for employees using visual display units by Evening Gazette (Middlesbrough, England)
But there is no evidence to show that VDUs cause disease or permanent damage to the eyes.
Give your eyes a break by Liverpool Echo (Liverpool, England)
 
 
 
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