Computer Systems can be viewed as a set of five cooperating subsystems: ... Tells the computer how to perform operations like input, output and storage ...
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Keyboard the CPU. Changes data to produce information
most common - QWERTY keyboard
digitising - views a page and produces an image
flatbed and hand held
voice recognition equipment
Printers the CPU. Changes data to produce information
also called VDU - visual display unit
display broken into a grid of pixels
Laptops have a flat panel - LCD - liquid crystal display
Other output devices
sound cardOUTPUT DEVICES