I have a friend who calls me occasionally to come 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 ...

You can scan the QR code on your own smartphone without needing a second device. Photo: Getty Images QR codes can be scanned directly on the same smartphone without a second device. We’ll show you how ...

QR codes are convenient because they can be scanned with a smartphone camera to access a website URL or used as secure login information, but because they are generally simple, black and white ...