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The document discusses different types of visual display units (VDUs) including CRT and LCD displays. It describes the key differences between CRT and LCD such as size, power consumption, image quality, and viewing angles. The document also defines terms associated with VDUs like pixel, refresh rate, and resolution. It outlines different screen technologies available today and the two main types of touchscreen technology: resistive and capacitive touchscreens. Resistive touchscreens require pressure while c

Author

Percival J Sayers

Language

EN