Distinguish between the following: OCR (Optical Character Recognition) and Bar Code Reader

Optical Character Recognition (OCR): Optical Character Recognition, usually abbreviated to OCR, is the mechanical or electronic conversion of scanned images of handwritten, typewritten or printed text into machine-encoded text. It is widely used as a form of data entry from some sort of original paper data source, whether documents, sales receipts, mail, or any number of printed records. It is crucial to the computerization of printed texts so that they can be electronically searched, stored more compactly, displayed on-line, and used in machine processes such as machine translation, text-to-speech and text mining. OCR is a field of research in pattern recognition, artificial intelligence and computer vision. Bar Code Reader: A Bar Code reader is an input device with an optical scanner which reads the bar code printed and converts the barcode into a machine readable form. A bar code reader consists of a light source, a lens and a light sensor translating for optical impulses into electrical signals. Bar Code reader has found wide acceptance in industry and is widely used in retail trade. It is also photo electric in nature.