You might have notice some cryptic 2-dimensional bar codes while browsing online. That's called Quick Response (QR) code. Compared to ordinary bar codes found in malls, it can store more information and character types while maintaining its small size.

Although this is not familiar image in the US yet, QR codes are prominent in Japan. In fact, Nokia Beta Labs manager Tommi Vilkamo proudly proclaims 2D barcodes will rule the earth. Right now, here are some applications of QR codes in our daily lives:

As mobile boarding pass in selected airports in the US.
As a way to bridge the gap between online and paper magazines (Spektacle and UK's The Sun tabloid magazine)
As shopping companion
As retailing tool
As a weapon for social activities
As a cool campus guide
As fashion design (maybe)

Despite some major developments in this field, it does not have significant impact yet in the US. You still cannot see it transforming into a necessity just like SMS or Bluetooth devices.

I guess it's too early to predict if it can rule the earth.

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