visual display unit

(redirected from visual)
Also found in: Dictionary, Thesaurus, Medical, Legal, Financial, Acronyms, Wikipedia.

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)

Visual Display Unit

(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.
References in periodicals archive ?
Following a clinical evaluation, all patients underwent assessments of the static visual vertical.
Although visual technology is already demonstrating real benefit for many organisations, the uncoordinated and piecemeal use of existing technologies, coupled with the perceived reduction in value as communication volume increases, has led many business communicators to approach new forms of technology with some caution.