1. Microsoft X-box Kinect. http://xbox.com. Microsoft X-box Kinect. http://xbox.com.
2. Nintendo Wii. http://www.nintendo.com/wii. Nintendo Wii. http://www.nintendo.com/wii.
3. Augmented lagrangian method. http://en.wikipedia.org/wiki/Augmented_Lagrangian_method. Augmented lagrangian method. http://en.wikipedia.org/wiki/Augmented_Lagrangian_method.
4. Using mobile phones to write in air