QR codes

QR (Quick Response) codes can hold different things as URL, email addresses and wifi login information, vcards and others

Figure 13.9. QR-code pointing to www.linurs.org

QR code

Such pictures can be made via https://www.qrcode-monkey.com/ that supports svg or https://www.qrstuff.com/. The ISO-18004 standard holds the definitions of those codes.

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