Whenever we buy some products, we might have seen some black and white bars on the back side. Have you ever wondered what it represented ? It is called as Bar Code. It represents a computerised information about the product encoded in a different format.
The code is scanned by a beam of light, and each bars represents a particular information about the product. Then these pulses of information are fed to the computer for decoding. Now a days, laser beams are used for reading these lines.
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