I / O allows the computer to get information from the outside world, and put his work there, can the physical form (hardcopy) or non-physical (softcopy). There are various kinds of devices I / O, from the familiar keyboards, monitors and disk drives, to the more unusual such as a webcam (web camera, printer, scanner, and so on.
Which is owned by all the usual input devices is that they encode (change) information of a kind to the data can be further processed by a digital computer system. Instrument output, decoding the data into information that can be understood by computer users. In this sense, the digital computer system is an example of data processing systems.
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