Product identification codes are unique sequences of numbers and/or letters assigned to specific items to distinguish them from others. These codes help manufacturers, retailers, and consumers track products throughout the supply chain, ensuring accurate inventory management and sales processes. Common examples include Universal Product Codes (UPCs) and International Standard Book Numbers (ISBNs). These codes facilitate efficient scanning at checkout and help prevent errors in ordering and stocking. By using product identification codes, businesses can streamline operations and improve customer service, making it easier for consumers to find and purchase the items they need.