Computer display monitor, a visual display unit, is a piece of electrical equipment which displays images generated from the video output of computer
systems, without producing a permanent record. Most newer monitors typically consist of a TFT LCD, with older monitors based around a cathode ray tube,
or CRT. Almost all of the mainstream new monitors available on market
now are LCD. The monitor comprises the display device, simple circuitry
to generate and format a picture from video sent by the signals source,
and usually an enclosure.