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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Barcode is the same as a basic number.
Let’s say there are a billion products in the world, you have to give each a unique number. You’d need a billion numbers (product codes). If you have a trillion codes in your system you know each product can get their own unique number and not overlap. The systems that use barcodes have way more than a trillion numbers.
The reason why product codes look like bars and are called bar codes is only for a scanner to be able to read a number code quickly. Bar when it was created technology couldn’t read text or numbers so a language of bars was created for this to work. Bar codes are just product codes translated into the language of scanners.
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