QR code (abbreviated from
Quick Response Code) is the trademark for a type of
matrix barcode (or two-dimensional
barcode) 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. A QR code uses four standardized encoding modes (numeric, alphanumeric, byte/binary, and
kanji) to efficiently store data; extensions may also be used.