**this is a sample of what QR can make **
made by : mohamed ramadan mohamed - 56
Resources :
http://en.wikipedia.org/wiki/Barcode
http://www.qrcode.com/en/codes/
http://en.wikipedia.org/wiki/QR_code
http://en.wikipedia.org/w/index.php?title=QR_code&oldid=446640692
http://en.wikipedia.org/wiki/CueCat
http://en.wikipedia.org/wiki/SPARQCode
http://www.qrcode.com/en/history/
http://www.barcodesinc.com/faq/
http://www.nacs.org/LinkClick.aspx?fileticket=D1FpVAvvJuo%3D&tabid=1426&mid=4802
http://www.ritservice.ru/products/aps/aztece.asp
http://www.av1611.org/666/barcode.html
http://www.ohio.edu/industrialtech/aidc/activities/research.cfm

projects :
http://blog.mltcreative.com/12-Creative-Ideas-for-Using-QR-Codes-in-B2B-Marketing

Application you can download to read codes (mobile):
NeoReader : https://play.google.com/store/apps/details?id=de.gavitec.android&hl=en
QRDroid : https://play.google.com/store/apps/details?id=la.droid.qr&hl=en

Application to generate :
http://kamocu.com/en/qrcode/

Application to generate and read (pc):
kaywa : http://qrcode.kaywa.com/