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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Most barcodes don’t have a “special sauce” that makes them work. It’s literally just a type of front. Sometimes there is a control character that adds an “return” to commit the font. When you scan a barcode at the checkout, it turns that barcode into a numeric UPC in the point-of-sale system, and presses enter to commit the input. That’s it.
If you have a barcode scanner and open a text editor and scan a barcode, it will put that barcode into the text editor as plain text. You can convert literally any string of text into a barcode, the only limit is the size of the barcode which is where QR codes come in, they fit more data into a smaller space.
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