A barcode system is a method of encoding information in a visual format that can be easily scanned and read by machines. It typically consists of a series of parallel lines and spaces of varying widths, which represent numbers or letters. Barcodes are commonly used in retail to track products, manage inventory, and streamline the checkout process. When a barcode is scanned using a barcode scanner, the machine interprets the pattern and retrieves the associated information from a database. This system enhances efficiency and accuracy in various industries, including manufacturing, logistics, and healthcare, by automating data entry and reducing human error.