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 ...

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 -- ...

If you spent any time in Chicago's River North Tuesday, you may have noticed a mural with a giant QR code painted on the side of a building. And if you're a Taylor Swift fan, you might know what the ...

QR codes are popular elsewhere in the world, and catching on in the U.S., but one barrier to common use is the need for a special app on a smartphone to read them. Not a problem now, as even ...

The mural, located at 25 W. Grand Ave. in Chicago's River North neighborhood, drew dozens of onlookers and Taylor Swift fans hoping to decode the puzzle NBC Universal, Inc. If you spent any time in ...