How a QR code works
If there's any silver lining to COVID, it's QR codes being normalized.<p>I remember trying to use a QR code in 2015 at a crypto meetup so I could buy a beer with Bitcoin (they organized with the bar that they'd get cash at the end if they played ball). After downloading a QR reader app, taking a picture with my phone, uploading the picture to the app, then realizing there was too much glare and trying again, they eventually just gave me a beer and put a tally mark on a notepad.<p>Just a few weeks ago I used a QR code to join a WiFi network and it took like 2 seconds (it found the network and entered the password for me). We've come a long way.