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QR Codes For The Road

I guess QR codes aren’t quite dead yet!

Back in the day, hobos, or “gentlemen of the rails”, used to use a kind of code that let other hobos know important information.  For instance, if they marked a cat-like symbol on a fence, it meant that a kind-hearted woman lived at that house and might give a hungry drifter food.  Or, three diagonal lines means that the place is unsafe and a hobo should get out of there as quickly as…
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