A Quick Response code or (QR) is a two dimensional barcode (matrix type), that is scanned with a smartphone camera or a web cam. The QR contains information both on a horizontal and a vertical axis which allows more data to be stored than in a standard barcode. The coding can be a "Uniform Resource Locator" (URL), which sends the user to a web site.
Here are some other uses of QR codes
- Business cards, for contact information
- Posters and signs, for concert information
- Magazines and advertising, for discount coupons and contest entry forms
QR codes were created in 1994, by Denso-Wave a Toyota subsidiary. It was originally used in automobile manufacturing for tracking auto parts.
Here is the link for more info.
http://www.denso-wave.com/qrcode/aboutqr-e.html
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