Ah, QR codes. Short for “quick response,” QR codes have been with us since 1994, but didn’t receive widespread usage until about 15 years later.
Those odd, square-shaped markers full of jumbled squares and lines you see printed practically everywhere, and even projected on television and movie screens, contain information usually used to identify products, prices, and locations, as well as directing devices like cell phones to websites and apps for payment processing and advertising purposes.
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