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Experiment: Do People Really know about QR Codes?

I have talked about QR Codes a few times in the past, mainly because I see them as a great opportunity to bridge the physical and digital worlds. For a quick refresher QR codes are two dimensional bar codes that can be printed on anything from a packing slip to a movie poster. These codes serve as a portal to some type of digital action: Web site, video, text message, and even a phone call.