For those interested in the creation of the QR code. Japanese TV Station NHK World have a 15 minute documentary charting it's creation - https://www3.nhk.or.jp

For those interested in the creation of the QR code. Japanese TV Station NHK World have a 15 minute documentary charting it's creation - https://www3.nhk.or.jp/nhkworld/en/ondemand/video/2072031/ https://www3.nhk.or.jp/nhkworld/en/ondemand/video/2072031/ It also features interesting details such as how they figured out the ratio of the marker squares should be.