You probably already know how to scan a QR code with your phone. It's simple enough: just open the camera app, point your phone at the code, and tap the link. What if you're on your computer, though?

The Camera app on your Windows computer lets you easily scan QR codes using your PC's webcam. If you need to scan a QR code from an image, you can use the Snipping Tool app or a QR code scanning ...

QR codes are a close cousin of the bar codes on product packaging that cashiers scan with infrared scanners to let the checkout computer know what products are being purchased.

A computer scientist explains why you should not trust all QR codes Just as it can be hazardous to click links in emails, visiting URLs stored in such codes can also be risky.

QR codes are a close cousin of the bar codes on product packaging that cashiers scan with infrared scanners to let the checkout computer know what products are being purchased.

QR codes are surrounded by blank space, the quiet zone, to help the computer determine where the QR code begins and ends. QR codes can include an optional logo in the middle.

QR codes are a close cousin of the bar codes on product packaging that cashiers scan with infrared scanners to let the checkout computer know what products are being purchased.