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A QR, or Quick Response, Code is a square black and white code, much like a bar code, that is read by a QR-specific code reader, including some cell phones. It encodes a description of the product it is on. To enable updating of these descriptions, it may include a web site address with the most recent description. As businesses try to figure out ways to take advantage of this additional information-delivery method, it is being used on t-shirts and boutique beer bottle labels to take users to a game. More information is available at Wikipedia, here. http://en.wikipedia.org/wiki/QR_code