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Definition: QR codes are two-dimensional barcodes that can be read by many cell phones and smartphones. The codes, which are small squares with black and white patterns, appear in a variety of places, such as magazine and newspaper ads. A QR code is used to encode some sort of information, such as text or a URL. The "QR" in QR codes stands for "quick response," as the codes are designed to be read quickly. QR codes can be read by dedicated QR code readers and ...
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