noun

A bar code is a machine-readable representation of data, consisting of parallel lines of varying widths and spacings. When scanned by a bar code reader, the data encoded in the bar code is quickly and accurately translated into a digital format that can be used by a computer or other device.

Example

1. The bar code on the package allowed the cashier to quickly scan the product and process the sale.
2. The bar code system was introduced to improve inventory management and increase efficiency in the warehouse.
3. The bar code reader failed to read the bar code, causing a delay in the shipping process.