stereochemistry (stÄr'Ä-Å-kÄm'Ä­-strÄ) The branch of chemistry that deals with the spatial arrangements of atoms in molecules and with the chemical and physical effects of these arrangements.
ECU. Short for Electronic Control Unit, the ECU is a name given to a device that controls one or more electrical systems in a vehicle. It operates much like the BIOS does in a computer.
Enter your car for a more accurate estimate. The electronic control unit (ECU) used in todayâs cars and trucks is used to control the engine and other componentsâ functions. An ECU is a computer with internal pre-programmed and programmable computer chips that is not much different from a home computer or laptop. The vehicleâs engine computer ECU is used to operate the engine by using input sensors and output components to control all engine functions.