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From Wikipedia: a QR code abbreviated from Quick Response code is a specific matrix barcode or two dimensional code that is readable by dedicated QR barcode readers and camera telephones. The code consists of black modules arranged in a square pattern on a white background. The information encoded may be text, URL, or other data. Common in Japan, where it was created by Toyota subsidiary Denso-Wave in 1994, the QR code is the one of the most popular types of two-dimensional barcodes. The QR code was designed to allow its …