QR Codes were invented by Denso Wave in 1994. At first, they were used to track vehicle parts during the manufacturing process. Now, QR Codes are a popular marketing tool, allowing users to quickly access websites and other media. A QR Code can contain such things as text, a URL, an SMS or a phone number. In our project the QR code is used to open the link to the data correct entry page. You can refer to this Guide, that will show you how to read them.