| An electrical device that receives information from sensors and makes decisions based on these inputs along with programmed information, and send out the decisions to actuators. | |
| Electric current that flows in one direction | |
| Gear that are mashed with the pinion gears inside the differential case and splined to the axle shafts. | |
| The method of providing traction to any of the wheels of a vehicle, as conditions require. Depending on the system, it may be full-time or part-time. |