The following items are commonly used automotive acronyms and abbreviations: * A4: 4-speed automatic transmission * A5: 5-speed automatic transmission * A6: 6-speed automatic transmission * ABS: Anti-lock braking system * AC: Alternating Current * A/C: Air conditioning * ADAS: Advanced Driving Autonomous Systems * ADB: * AdvHEV: Hybrid vehicle * AHC: * AMT: Automated manual transmission * AFL: Adaptive front light * AFS: Adaptive front-light system * ATLS: Automated truck loading systems * Autogas: LPG when used as a vehicle fuel * AWD: All Wheel Drive * CAB 1493: California Assembly Bill 1493 * CARB: California Air Resources Board * CCP: * CH4: Methane * CNG: Compressed natural gas * CO2: Carbon dioxide * : Continuous variable valve lift * CVT: Continuously vari