| AC | alternating current |
| ACECTT | advanced combustion and emission control technical team |
| AMR | Annual Merit Review |
| ANL | Argonne National Laboratory |
| APEEM | Advanced Power Electronics and Electric Motors |
| ARPA-E | Advanced Research Projects Agency-Energy |
| ASCR | Advanced Scientific Computing Research |
| BatPaC | Battery Performance and Cost Model |
| BATT | Batteries for Advanced Transportation Technologies |
| BES | Office of Basic Energy Sciences |
| BETO | Bioenergy Technologies Office |
| BEV | battery electric vehicle |
| BFE | brushless field excited |
| BLDC | brushless permanent magnet DC motor |
| BMEP | brake mean effective pressure |
| BNL | Brookhaven National Laboratory |
| BTE | brake thermal efficiency |
| CAMP | Cell Analysis, Modeling, and Prototyping |
| C2G | cradle to grave |
| CAEBAT | Computer-Aided Engineering for Electric Drive Vehicle Batteries |
| CAFE | Corporate Average Fuel Economy |
| CAS | complex adaptive system |
| CAV | connected and autonomous vehicle |
| CCM | comparative cost metric |
| CCSU | carbon capture, storage and utilization |
| CERC | Clean Energy Research Center |
| CFD | computational fluid dynamics |
| CI | compression ignition |
| CLEERS | Cross Cut Lean Exhaust Emissions Reduction Simulations |
| CNG | compressed natural gas |
| CO | carbon monoxide |
| CO2 | carbon dioxide |
| CRC | Coordinating Research Council |
| CSTT | codes and standards technical team |
| DC | direct current |
| DCN | derived cetane number |
| DER | distributed energy resources |
| DOE | Department of Energy |
| DOT | Department of Transportation |
| DRIVE | Driving Research and Innovation for Vehicle Efficiency and Energy Sustainability |
| EEN | emergent entrepreneurial network |
| EERE | Energy Efficiency and Renewable Energy |
| EES | electrochemical energy storage |
| EESTT | electrochemical energy storage technical team |
| EGR | exhaust gas recirculation |
| EHC | electrochemical hydrogen compression |
| EIA | Energy Information Administration |
| EIT | engineered ionomer topology |
| EPA | Environmental Protection Agency |
| EPRI | Electric Power Research Institute |
| ESG | Executive Steering Group |
| EVI | Electric Vehicles Initiative |
| FACA | Federal Advisory Committee Act |
| FAME | fatty acid methyl ester |
| FCE | fuel cell energy |
| FCEV | fuel cell electric vehicle |
| FC-PAD | Fuel Cell Consortium for Performance and Durability |
| FCTO | Fuel Cell Technologies Office |
| FCTT | fuel cell technical team |
| FEERC | Fuels, Engines and Emissions Research Center |
| FPITT | fuel pathway integration technical team |
| FWG | Fuels Working Group |
| FY | fiscal year |
| g | gram |
| GDI | gasoline direct injection |
| GGE | gasoline gallon equivalent |
| GHG | greenhouse gas |
| GITT | grid interaction technical team |
| GREET | Greenhouse Gases, Regulated Emissions, and Energy Use in Transportation |
| GTDI | gasoline turbocharged direct injection |
| GTR | Global Technical Regulation |
| H or H2 | hydrogen |
| H2A | Hydrogen Analysis |
| HC | hydrocarbon |
| HDSAM | Hydrogen Delivery Scenario Analysis Model |
| HEV | hybrid electric vehicle |
| HFCV | hydrogen fuel cell vehicle |
| HPTT | hydrogen production technical team |
| HSECoE | Hydrogen Storage Engineering Center of Excellence |
| HT | Hydrogenious Technologies |
| HyMARC | Hydrogen Materials—Advanced Research Consortium |
| IAPG | Interagency Advanced Power Group |
| ICE | internal combustion engine |
| IEA | International Energy Agency |
| IM | induction motor |
| IQT | Ignition Quality Tester |
| IR | infrared |
| JOG | Joint Operations Group |
| kg | kilogram |
| kW | kilowatt |
| kWh | kilowatt-hour |
| LANL | Los Alamos National Laboratory |
| LBNL | Lawrence Berkeley National Laboratory |
| LH2 | liquid hydrogen |
| Li ion | lithium ion |
| LLNL | Lawrence Livermore National Laboratory |
| LTC | low-temperature combustion |
| LTGC | low-temperature gasoline combustion |
| MEA | membrane electrode assembly |
| MHC | metal-hydride compression |
| MOF | metal-organic framework |
| MOU | memorandum of understanding |
| mpg | miles per gallon |
| MTT | materials technical team |
| NAE | National Academy of Engineering |
| NAS | National Academy of Sciences |
| NETL | National Energy Technology Laboratory |
| NFPA | National Fire Protection Association |
| NHTSA | National Highway Traffic Safety Administration |
| NIST | National Institute of Science and Technology |
| NO | nitrogen oxide |
| NOx | nitrogen oxides |
| NRC | National Research Council |
| NREL | National Renewable Energy Laboratory |
| NVH | noise, vibration, and harshness |
| OEM | original equipment manufacturer |
| ORNL | Oak Ridge National Laboratory |
| PAN | polyacrylonitrile |
| PB | photobiological |
| PEC | photoelectrochemical |
| PEIS | Programmatic Environmental Impact Statement |
| PEMFC | proton exchange membrane fuel cell |
| PGM | platinum group metal |
| PHEV | plug-in hybrid electric vehicle |
| PNGV | Partnership for a New Generation of Vehicles |
| PNNL | Pacific Northwest National Laboratory |
| PV | photovoltaic |
| QTR | Quadrennial Technology Reviews |
| R&D | research and development |
| RCCI | reactivity controlled combustion ignition |
| RCM | rapid compression machine |
| RE | rare earth |
| RFS | Renewable Fuel Standard |
| RON | research octane number |
| SA | Strategic Analysis, Inc. |
| SBIR | Small Business Innovation Research |
| SCR | selective catalytic reduction |
| SCS | Safety, Codes and Standards |
| SEI | solid-electrolyte interphase |
| SGDI | spray-guided gasoline direct-injection |
| SI | spark ignition |
| SiC | silicon carbide |
| SMR | steam methane reforming |
| SNL | Sandia National Laboratories |
| SRM | switched reluctance motor |
| STCH | solar thermochemical hydrogen |
| SUV | sport utility vehicle |
| SyRM | synchronous reluctance motor |
| 21CTP | 21st Century Truck Partnership |
| TDS | total drive system/traction drive system |
| TE | transactive energy |
| TSTF | target setting task force |
| USABC | U.S. Advanced Battery Consortium |
| USCAR | U.S. Council for Automotive Research |
| UV | ultraviolet |
| V2G | vehicle-to-grid |
| VCR | variable compression ratio |
| VSATT | vehicle systems analysis technical team |
| VTO | Vehicle Technologies Office |
| WBG | wide bandgap |
| XANES | X-ray absorption near-edge structure |
| ZEV | zero-emission vehicle |
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