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Microsoft Tag creates unlimited possibilities for making interactive communications an instant, entertaining part of life. They tranform physical media (print advertising, billboards,product packages, information signs, in-store merchandising, or even video images)—into live links for accessing information and entertainment online.With the Microsoft Tag application, just aim your camera phone at a Tag and instantly access mobile content, videos, music, contact information, maps, social networks, promotions, and more. Nothing to type, no browsers to launch!
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This is a great technology if you can get it universally acceptable to all your mobile phones. I use it in Japan all the time. We have QR Codes on everything from business cards to the sushi in the supermarket.