You can scan a QR code using the camera on your smartphone, tablet, or computer — however, you may need to download an app.

— -- QR codes, those barcode-like images that can be scanned by smartphones, are showing up in magazine ads, on product shelves and billboards. We even saw one the other day on a dog collar. Taco ...

AT&T Monday unveiled a new barcode reader application called Code Scanner allowing subscribers to scan 2D codes and UPC codes found in magazines and stores as well as online. To the extent AT&T users ...