You've probably noticed a square barcode pasted to a graffitied light pole or on the back of a business card. That pixelated code, shaped in a square, is called a QR ...
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Difference between a barcode and a QR code
A Barcode is a 1-D code that contains just simple numbers or letters. A QR Code is a 2D square code that can contain a lot more information such as website links, payment information, contact ...
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