You've probably noticed a square barcode pasted to a graffitied light pole or on the back of a business card. That pixelated code, shaped in a square, is called a QR ...

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Forbes contributors publish independent expert analyses and insights. David Birch is a London-based advisor on digital financial services. Feb 28, 2024, 01:41pm EST Mar 12, 2024, 09:02am EDT This ...