QR code (abbreviated as Quick Response Code) is a trademark for a type of matrix barcode (or two-dimensional barcode) that was first designed for the automotive industry in Japan. A barcode is a machine-readable optical label that contains information about the item to which it is attached. QR code uses four standardized encoding modes (numeric, alphanumeric, byte/binary, and kanji) to efficiently store data; extensions can also be used. supported extensions, virtually any data type.