Add Yahoo as a preferred source to see more of our stories on Google. You don't need your phone to open a QR code. You probably already know how to scan a QR code with your phone. It's simple enough: ...
What is a QR code? A QR code is a kind of square-shaped barcode that stores information. QR stands for Quick Response. With your mobile phone, you can scan them and thus access the information they ...
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