ZXing (pronounced "zebra crossing") is an open-source, multi-format 1D/2D barcode image processing library implemented in Java, with ports to other languages.
An example of a Data Matrix code, encoding the text: "Wikipedia, the free encyclopedia" Data Matrix code for 'Wikipedia', coloured to show data (green), padding (yellow), error correction (red), finder and timing (magenta) and unused (orange).
QR code for the URL of the English Wikipedia Mobile main page, " http://en.m.wikipedia.org " Telephone directory with QR code on the cover QR code (abbreviated from Quick Response Code ) is the trademark for a type of matrix barcode (or two-dimensional bar code) first designed for the automotive industry in Japan.