A QR code is a type of two-dimensional barcode that can be scanned by a mobile device with a camera. When a QR code is scanned, it takes the user to an online resource or application that can be accessed through the QR code. QR codes have many uses, including marketing and advertising, product tracking, and customer service. They are also used in various applications such as booking tickets, accessing information about products, and sharing contact information.     Visit http://www.qr.net/