"We no longer need to be tethered to a desktop computer in order to use the internet to interact with the world around us. When you see something that you want information about, you no longer have to make a mental note to look it up later on Google. You can simply point your smartphone at the object and obtain the desired information without typing or speaking. In essence, the QR code has become the shortest distance between curiosity and information retrieval.
The beauty of QR codes is that they are an open-source and freely licensed standard. They cost nothing additional to add to printed materials and can be scanned by free readers on all smartphones and even some feature phones."
http://mashable.com/2011/03/08/mainstream-qr-codes/
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