Just stumbled across an interesting documentary about the QR Code phenomenon in Japan. QR codes are simple two-dimensional bar codes capable of storing up to ~4000
characters of information. They typically look something like this:
Maybe you've seen them already. In Japan you can find them on buildings, billboards, magazine ads, product packages, etc. They're basically everywhere. In order to decode QR codes, you just take a picture with your cell phone. The (hopefully installed) QR code reader then decodes it and brings up the information. QR code readers are available for quite a lot of mobile phones already. If you want to, you can even generate your own QR codes.
Maybe you've seen them already. In Japan you can find them on buildings, billboards, magazine ads, product packages, etc. They're basically everywhere. In order to decode QR codes, you just take a picture with your cell phone. The (hopefully installed) QR code reader then decodes it and brings up the information. QR code readers are available for quite a lot of mobile phones already. If you want to, you can even generate your own QR codes.