How does the barcode system works?

Question

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?

In: 503

Answer 1

There probably are. You don’t need unique barcodes for every barcode on the planet. You need unique barcodes for products you need to process.

Imagine you have a barcode that reads as 1 for a piece of clothing you sell. The shop next door also has a barcode that reads as 1, but this is for a toaster.

Edit: corrected and completed by comment of Rubseb