As smartphones have become more and more ubiquitous, so have QR codes. These maze-looking squares are a type of matrix bar code that contains data — usually, QR codes point to a website or open a ...

I have a friend who calls me occasionally to help him with various little things having to do with the technology at his house. This week, one of his requests was to learn more about QR codes and how ...

QR codes have become a convenience of modern life. Just scan the black and white mosaic with your phone’s camera and you can do everything from connect to your hotel room Wi-Fi to pay for that public ...