Numerical identifiers are unique numbers assigned to objects, individuals, or entities to distinguish them from one another. These identifiers are commonly used in various fields, such as finance, healthcare, and technology, to streamline processes and improve organization. For example, a Social Security Number (SSN) in the United States serves as a numerical identifier for individuals, helping to track earnings and benefits. In addition to personal identification, numerical identifiers can also be found in products, such as Universal Product Codes (UPCs) used in retail. These codes help businesses manage inventory and sales by providing a quick way to identify and track items. Overall, numerical identifiers play a crucial role in enhancing efficiency and accuracy in data management.