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There are many types of input devices and deciding which one to use could save time and improve accuracy. Optical scanning, for example, is best used for printing questionnaires and retail tags. Optical scanning input devices include optical character recognition (OCR), which recognize certain printed characters. The OCR is an optimum way to read printed questionnaires because the optical character recognition senses marks made on forms. Relative to this, bar-code scanning is one of the most common optical scanning input devices. This device recognizes a bar code, which is the series of bars of different widths found on retail tags in stores...
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Common topics in this essay:
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