Sensors convert a physical signal into an electrical signal that may be manipulated symbolically on a computer. A wide variety of sensors have been developed for aerospace, automotive, and robotics applications.

 

Example:Pen Based interaction. Haptic sensor.Pressure Sensor

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A tablet computer switching the orientation of the screen, maps orienting themselves with the user’s current orientation and adapting the zoom level to the current speed, and switching on the backlight of the phone when used in the dark are examples of computers that are aware of their environment and their context of use. Less than 10 years ago, such functions were not common and existed only on prototype devices in research labs working on context-aware computing.