Quick response (QR) codes are suddenly everywhere again. Invented in 1994 by an award-winning team at Denso Wave, a subsidiary of Toyota, the QR code has found its way into almost every industry. They’re like a barcode on steroids. They might look like drunken chess boards, but the higgedly piggedly black and white squares hold much more information than the stripes of a barcode. And QR codes can trigger one of a selection of actions inside the scanning device—usually a smartphone.
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