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A comment on What am I missing about QR codes?.

Re:What am I missing about QR codes? by joonix on Saturday January 19, 2013 @04:03PM (#5084732)
I have no idea where QR codes came from and why they are so prevalent either. I have never seen anyone I know use them, and I have never been told how to scan them. What is the "official" app everyone uses to scan these things?
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