QR (Quick Response) codes are Smartphone or tablet (with reader app) readable and may be used to to enrich and/or ease customer/reader interaction and experience. Some QR functionality may be inaccessible if not on an active internet connection. This type of code was envisioned as “open source”, so there are wide varieties of free and nearly free services available online:   Start your search with the term “QR code generator”. Many sites that contain generators provide further free information from usage ideas to history and examples.

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This section is drawn from
http://www.gregathcompany.com/publish/design/qr.html

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