QR codes–square, dot-matrix variants of the venerable UPC–are becoming an increasingly popular way to share information such as URLs, contact details, GPS coordinates, and calendar events. The idea is ...

QR codes are everywhere, tantalizing us with hidden information. Of course, a few of them are portals to malware or other uncool business, so it's not a good idea to just scan them all and hope for ...

If you're not familiar with QR (Quick Response) codes, they are mobile barcodes that you can encode with different types of information, and then use a smartphone camera, and QR code reader app -- ...