The inventor of QR codes still takes the train to work and can decode them by hand. Masahiro Hara could’ve become a billionaire but gave his invention away for free. Thirty years later, he’s still at the same company, working on medical QR codes for disaster response. “QR” simply means “Quick Response” - he was obsessed with speed, not profit. Some people just like to change the world quietly. Part 1 | Suresh Kochattil