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Researchers at TU Wien in Vienna have created a QR code so small it can only be read with an electron microscope. The code measures roughly 1.98 square micrometers, with individual pixels about 49 ...
If there's a shortage of anything, it's understanding of how QR codes work.
A QR Code scan is like a raised hand in a crowded room. It’s voluntary, visible, and tells you exactly who’s interested. Compare that to website cookies, which are more like secretly following someone ...