Joystick controllers use potentiometric, inductive or photoelectric sensing systems and/or switches to translate joystick motion into an output signal. They are usually made from plastic, nylon, nylon plastic, glass-filled nylon, or stainless steel.  Several types of joystick controllers are available. Industrial joystick controllers are used in demanding environmental conditions or heavy-duty equipment such as forklifts, cranes, agricultural machinery, hoist devices, vehicle steering, excavators, and municipal or military vehicles. Precision joystick controllers are used for steering, positioning and speed control in applications such as microscope control. They are also used in camera controls, wheel chairs, surveillance cameras, optical measurement equipment, medical diagnostic equipment, and stage techniques. Game joysticks are used in flight simulators, video games, and remote controls.