Editing Instrumentation (section)

===Automotive===
Modern automobiles have complex instrumentation. In addition to displays of engine rotational speed and vehicle linear speed, there are also displays of battery voltage and current, fluid levels, fluid temperatures, distance traveled, and feedback of various controls (turn signals, parking brake, headlights, transmission position). Cautions may be displayed for special problems (fuel low, check engine, tire pressure low, door ajar, seat belt unfastened). Problems are recorded so they can be reported to  [[Vehicle bus|diagnostic equipment]]. Navigation systems can provide voice commands to reach a destination. Automotive instrumentation must be cheap and reliable over long periods in harsh environments. There may be independent [[airbag]] systems that contain sensors, logic and actuators. [[Anti-lock braking system|Anti-skid]] braking systems use sensors to control the brakes, while [[cruise control]] affects throttle position. A wide variety of services can be provided via communication links on the [[OnStar]] system. [[Autonomous car]]s (with exotic instrumentation) have been shown.