This is another form of computer interface which converts the har;'d's or physical motion into signals and sends to the computing device. Such devices are already there in the market, majorly in two forms. In some high end mobile phones, some are using it for auto orientation of the screen from landscape to portrait and vice versa when the user turns the device, or is used for phones to track your physical activities and count your speed and number of steps while jogging with your phone.

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The other device which is making a real use of accelerometer is the Nintendo Wii, which has accelerometer based game pads, also known as nunchucks. These devices are small handhelds which connect with the console wirelessly and when they're moved, they recreate the movement action inside the game, making it much more realistic to play games like tennis, boxing, etc.

If you have seen the movie, Minority Report, then you would easily be able to imagine where this technology is heading. We might very soon see interface devices like gloves to interact with the computer by just hand gestures.