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A QR code, in English QR code, in long form quick response code, is a type of two-dimensional barcode (or matrix code) - machine-readable optical format that can be viewed on the screen of a mobile device or printed on paper - made up of black square modules arranged in a square with a white background. These points define the information contained in the code. There are other two-dimensional barcode formats with similar functioning, such as Flashcode or 2D-Doc, often confused with the QR code. .QR (short for quick response) means that the content of the code can be decoded quickly after being read by a QR code reader installed on a mobile phone, smartphone, tablet or even a webcam.The QR code is a smart, interactive and complete label.as a characteristic: .Quick Response.
.flashcode .the content of the code can be decoded quickly
