That weird box you are starting to see that looks like a cross between a puzzle and a bar code is actually called a QR code (short for Quick Response) is a specific matrix bar code, readable by dedicated QR bar code readers, smart phones, and camera phones. The code consists of black modules arraigned in a square pattern on a white background. The information encoded can be text, a URL or other data.
QR codes storing addresses and URL's may appear in magazines, on signs, in stores and supermarkets, business cards, website or on just about any object which users might need information. Users with a smart or camera phone equipped with the correct reader application can scan the image of the QR code to display text, contact information, connect to a wireless network, or open a web page in the phone's browser.
There are many free, easy to use sites available for creating QR codes on such is http://createqrcode.appspot.com/
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