Ī QR code consists of black squares arranged in a square grid on a white background, which can be read by an imaging device such as a camera, and processed using Reed–Solomon error correction until the image can be appropriately interpreted. Applications include product tracking, item identification, time tracking, document management, and general marketing. The Quick Response system became popular outside the automotive industry due to its fast readability and greater storage capacity compared to standard UPC barcodes. A QR code uses four standardized encoding modes (numeric, alphanumeric, byte/binary, and kanji) to store data efficiently extensions may also be used.

In practice, QR codes often contain data for a locator, identifier, or tracker that points to a website or application. A barcode is a machine-readable optical label that contains information about the item to which it is attached. QR code for the URL of the English Wikipedia Mobile main page.Ī QR code (an initialism for Quick Response code) is a type of matrix barcode (or two-dimensional barcode) invented in 1994 by the Japanese automotive company Denso Wave.

The square register app