Usefull Links

When you need a code without graphical integration

When the QR codes need to be read/scanned using a desktop PC.

Readers for Your mobile phone can be found in the various App stores.
I recommend the I-Nigma reader, it is available for multiple mobile platforms.
This reader and some other good mobile phone candidates can be found here:

Technical background about QR Codes

Nederland in bedrijf, Uw online bedrijven portal.

QR Media Guide, a Guide to all things QR Code!

PaperSpecs - Paper Information, Inspiration & Insights