Linear barcodes are a type of one-dimensional barcode that consists of a series of parallel lines and spaces of varying widths. These barcodes encode data in a linear format, typically representing numbers or alphanumeric characters. They are commonly used in retail and inventory management to quickly identify products and track stock levels. The most recognizable example of a linear barcode is the UPC (Universal Product Code), which is often found on consumer goods. Linear barcodes can be scanned using a barcode scanner, allowing for fast and accurate data entry, improving efficiency in various industries.