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What is a QR code: A QR code (from the English Quick Response code) is the evolution of the QR code. I say bars. It is a module for storing information in a dot matrix or two-dimensional barcode. The matrix is read on the mobile device by a specific reader (QR reader) and immediately takes us to an application on the Internet, a location map, an email, a page. Web page or a profile on a social network. It was created in 1994 by the Japanese company Denso Wave, a subsidiary of Toyota. It presents three squares in the corners that allow the reader to detect the position of the code. The goal of the creators (a two-person team at Denso Wave, led by Masahiro Hara) was for the code to allow its content to be read at high speed. QR codes are very common in Japan, where they are the most popular two-dimensional code.
