A QR code (short for "quick response" code) is a type of barcode that contains a matrix of dots. It can be scanned using a QR code reader with built-in camera. This QR code is scanned by using QR code reader which after scanning gives a value in an alphanumeric form. QR codes store data using patterns of black dots and white spaces, arranged in a square grid. These patterns can be scanned and translated into human readable information.