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 ...

Add Yahoo as a preferred source to see more of our stories on Google. You can scan the QR code on your own smartphone without needing a second device. Photo: Getty Images QR codes can be scanned ...

Software built into the cameras on iPhones and Android phones makes quick work of decoding QR codes. How do you do that on a laptop or desktop computer? I have a friend who calls me occasionally to ...