Created in 1994 by Toyota subsidiary 'Denso Wave' to quickly track vehicles and parts through the company's automotive manufacturing process, QR codes are used more commonly today for logging into ...

Ryssdal: All right, so let’s go through some of these. One of them is QR codes. Talk to me about QR codes and how that worked — well, not how the QR codes work, but how that whole, you know ...