Facebook has recently implemented a system that creates QR Coded status messages.
Whats a QR Code?
According to Wikipedia, a QR Code is a two-dimensional bar code created by Japanese corporation Denso-Wave in 1994. The "QR" is derived from "Quick Response", as the creator intended the code to allow its contents to be decoded at high speed.
A QR code can store up to 4,296 characters of text or just about 2MB of binary data. Once intepreted, the data recorded can lead you to a website.prompt you to make a phone call or send a text or e-mail.
You can even create a vCard to add a contact to your device or provide location coordinates in Google Maps.
As you can see, the possibilities are endless!!
QR Codes need to be interpreted by a reader, the Kaywa reader is the best I've seen so far for Nokia S60 Devices, download it for free here ~ http://reader.kaywa.com (registration required)
Are there any other code readers you use?
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You can create your own QR Codes here