QSC8.3 and QSL9 Acronyms and Abbreviations Section i - Introduction Page i-7 Acronyms and Abbreviations General Information The following list contains some of the acronyms and abbreviations used in this manual. ANSI American National Standards Institute API American Petroleum Institute ASTM American Society of Testing and Materials ATDC After Top Dead Center BTU British Thermal Unit BTDC Before Top Dead Center °C Celsius CAN Controller Area Network CO Carbon Monoxide CCA Cold Cranking Amperes CARB California Air Resources Board C.I.B. Customer Interface Box C.I.D. Cubic Inch Displacement CNG Compressed Natural Gas CPL Control Parts List cSt Centistokes DEF Diesel Exhaust Fluid