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.A good, computing hardware is when raw data enters the computer.

. The processing is mainly handled by the Central Processing Unit (CPU).

.The most common manual input devices are the keyboard and mouse

.Each button on a concept keyboard relates to a particular item or function

.A scanner can be used to digitise images

.A touch sensitive visual display unit (VDU) or screen has a grid of light beams or fine wires criss-crossing the screen that are used to detect touch

.Barcodes are represented by black vertical bars and are read by a barcode reader.