The car pillar in the vehicle stands in the near-vertical position, which supports the vehicle's roof. However, the A-pillar and the D pillar stand inclined in some vehicles for aerodynamic reasons. Furthermore, the manufacturers identify the car pillars from the side while moving from front to rear of the vehicle. The consistent alphabetical designation of a car's pillars provides a common reference for design discussion and critical communication. This is used by insurance companies to identify damaged components and rescue teams employ pillar nomenclature to facilitate communication when cutting wrecked vehicles, as when using the jaws of life