WHAT IS A "QR" CODE?

A QR code (quick response code), is useful for storing information in a two-dimensional bar code created by Japanese corporation Denso Wave, a subsidiary of Toyota, in 1994 module.

Characterized by the three squares that are in the corners and to detect the position of the code reader. The "QR" is derived from the acronym English phrase Quick Response, as the creators had intended the code to allow its contents to be read at high speed.

QR Codes are common in Japan, where they are the most popular two-dimensional code in there.