Top Dead Center; the highest point of the piston during its stroke.

- Pre-Trip Travel Information; Ride Matching and Reservation; Demand Management; and Operations

Antilock Braking System; keeps the tires from locking while braking; the car can still be handled without losing control.

Adaptive Cruise Control; the ACC system scans the area ahead of a car for objects - mainly other cars - and applies the brakes automatically if a collision is likely to occur.

In a computer, the basic work register of the computer. In hydraulics or pneumatics, a device for storing pressurized fluid.

A device which performs a mechanical action in response to an input signal, which may be either electric or fluidic.

Analog-to-Digital converter; an electronic circuit or device that converts an analog input signal into a digital signal.

Advanced Driver Information Systems; a combination of infrastructure and in-vehicle displays that communicate information to the driver (emergency and general.)

Air/Fuel ratio.

An electronic circuit which amplifies, reduces or otherwise alters a voltage signal which is a smooth or continuous copy of some physical quantity.