QR code: This is Quick but My Response is Slow... Oh? Mathe-Magic is Inside? :-P

.

Yeah, you probably heard this QR code already. Ooigi too, have seen it but never try to find out what is this rectangular "maze-code" (derived from bar-code) is all about. Like usual, Wiki is a great place for our QR info-digging and sometimes we can almost see Wiki in the top 10 SERPs for Google.com. Eh? Wrong blog for IM? :-P

"Borrowed" from Wiki:
QR in full means Quick Response. Usually seen with a visible black dot rectangle, QR code is a black&white maze-looking barcode able to show information in 2-dimensional way. The above example is a QR code for http://Ooigi.blogspot.com, and you can see the visible black dot rectangle mentioned before.  ;-)

Information encoded is read vertically and horizontally, hence it's called the 2D code. This way of data encoding enables more data representation, up to several hundred times more compared to data read from ordinary bar codes. Different data type can be made into a QR code, such as:

1. Normal text, just any text.
2. Your website URL. 
3. RSS feeds. 
4. Telephone number. 
5. Text message, or SMS. 
6. E-mail address. 
7. E-mail address together with e-mail message.
8. Your contact details: vCard or meCard. 
9. Events (vCalendar). 
10. Google Maps. 
11. WiFi network.
12. Paypal "Buy now" link. 
13. Last but not least, our own social media profile - Twitter tweets, Facebook profile/page, MySpace, LinkedIn or our FourSquare venue~   :-D 
14. (You can say that you can fit almost any information as a QR code~)

QR code for image? Your version of graphical QR code can be found in Design QR. Or try read a QR comic then, heehee~~   X-D (To read the next chapter, click the underscore sign _ located on your left, at the uppermost part).

How to read a QR code? You can use the QR scanner/reader itself, use your mobile phones (the one with a camera), or use your smartphones. If you wish to read QR code online, you can do it in ZXing Decoder Online~ (Or I should rather say online QR reader/scanner?)  :-?

QR Code Scanner Apps for iPhone

Bakodo, iDecoder, QRReader, Scanner, and ZBar: free iPhone application to read a QR code.

QR code is free to use and there is no need to apply any license for it. And QR code is a registered trademark of Denso Wave Incorporated. To create a free QR code for yourself, you may visit these sites and download the image~~   :-D

• Kaywa QR code generator: Very simple QR code generator. They provide their own Kaywa reader sfotware, and you can get their beautiful QR pixel scarf too~
• QR Stuff: This site is amazing. Plenty of QR related stuff. Sign up for exclusive QR code generator~
• Delivr QR code generator: Analytics for your QR codes? Whoaaa...
• ZXing Project - QR code Generator: QR code for WiFi network?
• SnapMaze: Simple QR code generator. Comes with 7 different colors.

Even this QR codes is still new to us, QR code has attract many people to use it. Some even integrate it into the "treasure hunt" game, where you need to search for the next hidden QR code to get the next clue. I don't know either this code is good to be the next puzzle novel but i can be quite an interesting unique photoblog novel~ ;-)

Love to read more?

• Denso-Wave: The mother of QR Code®. From this site I get the idea QR code is a mathematical magic. But where I found it? Somewhere in the error handling? Hurmmm.. X-(
• Mashable: 5 unique uses for QR codes~
• Mashable: URL Shortener Bit.ly Now Generates QR Codes, Too. Goo.gl.qr?
• Wikipedia barcode: Images of First, Second and Third Generation Barcodes.

Ooigi.blog: "QR code looks similar to her brother Data matrix?"
p/s: Strangely different site comes up with different QR code even using the same text or URL? 
.