Input and Output Devices
Before a computer can process your data, you need some
method to input the data into the machine. The device you use will depend on
what form this data takes (be it text, sound, artwork, etc.).
Similarly, after the computer has processed your data, you
often need to produce output of the results. This output could be a display on
the computer screen, hardcopy on printed pages, or even the audio playback of
music you composed on the computer.
The terms “input” and “output” are used both as verbs to
describe the process of entering or displaying the data, and as nouns referring
to the data itself entered into or displayed by the computer.
Below we discuss the variety of peripheral devices used for
computer input and output.
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