Cars are equipped with controls used for driving, parking, and passenger comfort and safety. Modern cars' controls are now standardised, but this was not always the case. Controls are evolving in response to new technologies, for example the electric car. Since the car was first invented, its controls have become fewer and simpler through automation, for example all cars once had a manual controls for the choke valve, clutch, ignition timing, and a crank instead of an electric starter. However new controls have also been added to vehicles, making them more complex. Examples include air conditioning, navigation systems, and in car entertainment. Another trend is the replacement of physical knob and switches for secondary controls with touchscreen controls such as BMW's iDrive and Ford's MyFord Touch.