What type of device is a barcode reader categorized as?

A barcode reader is categorized as an input device because its primary function is to capture and input data into a computer system. When a barcode reader scans a barcode, it decodes the information represented by the barcode and transmits this data to the computer for processing. This data typically includes product information, pricing, or inventory data, enabling the system to perform various functions such as inventory management and checkout processes.

In contrast, output devices are responsible for conveying data from a computer to the user, such as printers or monitors. Since a barcode reader does not perform these output functions, it solely serves the role of an input device. Consequently, the classification of a barcode reader aligns with its specific purpose in the data collection and processing workflow.