If you want to be old school techie then "SPO" (Serial Printer Output) was the original name for all visual output medium on computers, because that plus tape was the only output devices that the computer recognised as valid.
These days one normally uses Screen or Monitor for all mediums irrespective of if they are Liquid Crystal Display or CRT (Cathode Ray Tube).
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VDU is another name use to represent a monitor. Therefore, the two tyes of VDU is Visual Display Unit and Cathode Ray Tube.
By. Eze Daniel.
VDU stands for Visual Display Unit - The technical term for the computer's monitor.
The Full Form Of VDU is "VISUAL DISPLAY UNIT"
a monitor, an computer screen, a projector
A VDU is hardware.
One example is the monitor (screen) of a computer that displays text and graphics.