A UPC, or Universal Product Code, is a unique identifier used to track products in stores. It consists of a 12-digit number and a barcode, which is a series of black and white stripes that can be scanned electronically. Each UPC is assigned to a specific product, allowing retailers to quickly check prices, manage inventory, and process sales. The UPC system is widely used across various industries to standardize product identification and streamline the checkout process.

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