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 ...

Many of you reading this have undoubtedly seen a QR (Quick Response) code by now (the thing pictured to the right), but there's just as much -- if not more -- confusion surrounding them today as there ...

You might not think about them much. When you do, it might be to decry the invasion of robot vomit onto every ad, billboard and poster. Still, the humble two-dimensional QR Code-- originally developed ...