Like how is there no overlap of barcodes at all? There’s are millions if not, billions of items around the world that have unique barcodes. Are they differentiated per country or something?
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It might seem like there are only a few million or so combinations. but think of it this way.
A given “width” of the barcode can be either black or white. Let’s say there are about 50 widths in a typical barcode. That makes 2^(50) unique combinations (~1,000,000,000,000,000)
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