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English definition of “bar code”

bar code

noun [C]    
a small rectangular pattern of thick and thin black lines printed on a product, or on its container, so that the details of the product can be read by and recorded on a computer system: A handheld scanner is used to read bar codes. → Compare QR codeComputer concepts
(Definition of bar code noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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