write a short note on BCR.
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Barcode readers and scanners
A BCR (barcode reader)or scanner, also known as a POS (point of sale) scanner is a hardware input device capable of reading a barcode using a laser. It can also print out the details of the product or log information about that product into a database.
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BarCode Reader (BCR) definition
A barcode reader is a hand-held or stationary input device used to capture and read information contained in a barcode. A bar-code reader consists of a a lens, light source and a light sensor which translates optical impulses into electrical ones.
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