Bar-code readers, price scanner, point-of-sale (POS) scanner or barcode scanners are generally found in supermarkets and large departmental stores. It is a type of scanner which is used for reading printed barcodes.
BarCode Reader (BCR) definition
A barcode reader is a hand-held or stationary input device used to capture and read information contained in a barcode.
A bar-code reader consists of a a lens, light source and a light sensor which translates optical impulses into electrical ones. Moreover, nearly all barcode readers consists of a decoder circuitry that analyzes the barcode’s image data provided by the sensor and sends the barcode’s content to the scanner’s output port.