Quick Response code

QR code is a matrix barcode that can contains beyond 7000 numbers and 4000 alphanumeric characters in a simple B/W square image. QR is the acronim of "Quick Response" and was created in 1994 by a japanese company for Toyota factory to organize car components. A QR code can include more information than a traditional barcode and it can be read by optical reader in a while. Actually it happed an increase of use of this codification, many smartphone, like iPhone has an application able to decode every kind of message hide in a small black and white square. Often this code gives possibility to exchange informations from different kind of devices, like our contacts from a phone to a pc/mac.
On Apple store you can find so many Apps to create and read QR codes.
To create codes online you can use quirify and download code images in .jpg and .png format.


Source: Wikipedia, Quirify, Apple