M&S have started to use QR codes on their products to provide more information and to give access to exclusive offers. Although QR codes have been around since 1994 it's only recently that the technology has become commonplace to read them on the go. Now that most mobiles have cameras with a high enough resolution to read QR codes and have access to the web, a simple lookup is possible. By scanning a QR code the user can then be taken to a website for example. The applications here are endless...
http://www.crackunit.com/2009/08/07/qr-enabled-ms-orange-and-mango-juice/
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