Which of the following is not related to a computer monitor ?

VDU

Plasma Display

Pointing devices

CRT

VDU – Visual Disply Unit. – An electronic visual display, informally a screen, is a display device for presentation of images, text, or video transmitted electronically, without producing a permanent record. Electronic visual displays include television sets, computer monitors, and digital signage.
Plasma Display – A plasma display is a computer video display in which each pixel on the screen is illuminated by a tiny bit of plasma or charged gas, somewhat like a tiny neon light. Plasma displays are thinner than cathode ray tube ( CRT ) displays and brighter than liquid crystal displays ( LCD ).
Pointing devices – A pointing device is a human interface device that allows a user to input spatial data to a computer.
CRT – A cathode-ray tube (CRT) is a vacuum tube containing one or more electron guns, the beams of which are manipulated to display images on a phosphorescent screen.

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