Universal Product Codes (UPCs) are a type of barcode used to uniquely identify products in retail stores worldwide. Some synonyms for UPCs include barcodes, product identifiers, item numbers, and scannable codes. These terms refer to the same concept of a machine-readable code that contains information about a product's manufacturer, specifications, and pricing. Other similar terms include GTIN (Global Trade Item Number), EAN (European Article Number), and ISBN (International Standard Book Number). While they may differ in format and usage, all of these codes serve the same purpose of facilitating faster and more accurate tracking and management of products in the supply chain and at the point of sale.