QR codes cut costs of subway safety doors Now, officials with the Tokyo government have found a way to make things radically cheaper. Miyake Takashi has almost no eyesight.

Don’t scan the QR code. If you don’t know who sent it, don’t take the risk. Return to sender or throw it away. If the package has a return label, send it back. Otherwise, dispose of it safely. Use the ...

QR codes have been with us for a long time now, and after passing through their Gardenesque hype cycle of inappropriate usage, have now settled down to be an important and ubiquitous part of life.

Recently [mit41301] wondered about increasing the data capacity of QR codes, and was able to successfully triple the number of bits using color. He chose the new rectangular micro QR code (rMQR ...