Hacker News
- QR code on Djokovic's positive test reveals a likely December 26 test date, ten days later than claimed. https://zerforschung.org/posts/djokovic-pcr-test-en/ 6 comments tennis
- Tokyo's N Building is covered in QR codes that can be read by your phone for up-to-date information—including Twitter updates from the building's inhabitants as they happen. http://gizmodo.com/5446228/augmented-reality-facade-shows-buildings-real+time-deets-and-tweets 4 comments technology