These are QR codes. Some in the web industry think they have a big future in user engagement while others believe they will go the way of the Dodo (or the Cue ...
www.greenfieldbelser.com/blog/2012/.../qr-codes-demystified/
via Google Alerts - qr codes
www.greenfieldbelser.com/blog/2012/.../qr-codes-demystified/
via Google Alerts - qr codes
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