Kinect 

Originally developed for gaming by Microsoft, the Kinect is a depth-sensing camera that combines RGB imaging with 3D motion sensing and skeletal tracking for gesture recognition.

How: Tracks body movements, gestures, and depth perception for motion sensing.

Where: Common in motion capture, gaming, interactive installations, research, and healthcare rehabilitation.

When: Useful in scenarios requiring motion tracking, body interaction, and depth recognition, such as immersive experiences or physical therapy applications.