A barcode scanner is an electronic device used to read and interpret barcodes, typically found on products, labels, or packaging. These scanners use light sensors to capture the information encoded in the barcode, which can be in various formats such as one-dimensional (1D) or two-dimensional (2D). The scanner converts the barcode's pattern into digital data, which is then transmitted to a computer or system for processing.

Barcode scanners are commonly used in retail, logistics, healthcare, and inventory management. They come in various types, including handheld scanners, fixed-mount scanners, and wireless models. Some scanners use laser technology to scan barcodes, while others use image-based sensors or camera systems for 2D scanning.

They improve accuracy, speed up transactions, and enhance productivity by quickly retrieving product information and linking it to databases for pricing, stock tracking, and more. These devices are essential for businesses looking to streamline operations and reduce human error.