The touch screen is an input device, so it needs to be combined with a display and a PC or other devices to make a complete touch input system. Touch screen is one of the easiest PC interfaces to use, making it the interface of choice for a wide variety of applications. The touch screen interface is useful in systems ranging from industrial process control to home automation. By integrating the input device with the display, valuable workspace can be saved. With a graphical interface, operators can monitor and control complex operations in real- time by simply touching the screen. The touch sensor used her is a clear glass panel with a touch-responsive surface. The sensor is placed over a display screen so that the responsive area of the panel covers the viewable area of the video screen. The sensor generally has an electric current going through it, and touching the screen causes a signal change. This change is used to determine the location of the touch in the screen.