QR codes were born in Japan but are becoming more and more popular around the world and you pretty much can find them everywhere on the web, in magazines, on the streets and even Android nowadays ships with a native QR code reader. The information encoded in a QR code can be text, URL or other data and can be read by most bar code readers and mobile phones. NOTE: Use 1.x with Vaadin 6 and 2.x with Vaadin 7.