That's Maths: How barcodes and QR codes work
The first barcode was scanned on Wrigley’s gum in 1974. Now QR codes, which store much more data, are appearing everywhere
The first barcode was scanned on Wrigley’s gum in 1974. Now QR codes, which store much more data, are appearing everywhere
Crosswords & puzzles to keep you challenged and entertained
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