Which device is used to read barcodes?

A barcode reader is specifically designed to interpret the information encoded in barcodes. Barcodes are graphical representations of data that can be read by scanning devices. A barcode reader uses a laser or LED light to scan the barcode, capturing the pattern of lines and spaces that represent numeric or alphanumeric information. This device then converts the scanned data into a format that can be processed by a computer or other electronic systems, enabling the quick and efficient retrieval of product information.

While a scanner can also read barcodes, it is a more general term that encompasses devices capable of digitizing physical documents or images, not exclusively barcodes. In contrast, a barcode reader is specialized for this specific task. A printer produces physical copies of data or images, and a monitor displays computer output; neither are involved in the reading of barcodes. Therefore, the barcode reader is the most accurate answer in this context.