QR Codes 101
QR (Quick Response) Codes are two dimensional bar codes that were created in Japan by Denso Wave corp. QR codes hold data that can be quickly read and decoded by QR code reading applications.
The fine folks at Clockwork Active Media Systems explain what they are and how they’re being used. There are multiple QR code reading apps in the iTunes store. QR app [iTunes link] is one such app and it is free. I’ve seen one QR code in the wild (on a movie poster) but of course my phone battery was dead. If you’ve ever used Northwest Airlines’ E-Boarding Pass, that’s a QR code that you scan at the security gate.
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