QR Codes - 7 interesting things you may not know

1. QR codes are old
QR codes were invented in October 1994 by Denso-Wave.

2. License
The use of the QR Code is free of any license. The QR Code is clearly defined and published as ISO standard. Denso Wave owns the patent rights on QR Code, but has chosen not to exercise them.
The term QR Code itself is a registered trademark of Denso Wave Incorporated.

3. Formats
You can store:
* contact information
* URLs
* SMS messages
* GPS coordinates
* text

4. Error correction capacity
Level L 7% of codewords can be restored.
Level M 15% of codewords can be restored.
Level Q 25% of codewords can be restored.
Level H 30% of codewords can be restored.

5. Rotation, Scale
Thanks to the corner pieces you can easily scan QR codes almost from any distance/aim/angle.

6. QR Code data capacity
Numeric only Max. 7,089 characters
Alphanumeric Max. 4,296 characters
Binary (8 bits) Max. 2,953 bytes
Kanji/Kana Max. 1,817 characters

7. Sky is the limit
A QR code, when scanned, can do many different things. It can automatically route your web-enabled cell phone to a website; transfer a phone number or contact card to your phone; display a text-based message on your phone; or trigger a predetermined SMS text message be sent to the phone that scanned it.

source: http://en.wikipedia.org/wiki/QR_Code