QR code is the trademark for a type of matrix barcode first designed in 1994 for the automotive industry in Japan. A barcode is a machine-readable optical label that contains information about the item to which it is attached. In …
A QR code used on a large billboard in Japan, linking to the sagasou.mobi website
QR codes have been used and printed on train tickets in China since 2010.
Japanese immigration landing permission with a QR code at the bottom. The QR code content is encrypted.
Damaged but still decodable QR code, Link to http://en.m.wikipedia.org