Final answer:
A barcode reader is a device used to scan barcodes on products at the point of sale or when taking inventory. It uses a laser beam or an image sensor to capture the information encoded in the barcode and translates it into a digital code that can be processed by a computer.
Step-by-step explanation:
A barcode reader is used to scan barcodes on products at the point of sale (POS) or when taking inventory. It is a device that uses a laser beam or an image sensor to capture the information encoded in the barcode. This information can include the product's name, price, and other details.
The barcode reader reads the barcode by scanning the black and white lines or dots and translates it into a digital code that can be processed by a computer. This technology is widely used in retail stores, warehouses, and other industries for efficient and accurate tracking of inventory.