| AC | Alternating current |
| AFV | Alternative fuel vehicle |
| BEV | Battery electric vehicle |
| BWR | Boiling-water reactor |
| CANDU | Canadian deuterium uranium reactor |
| CBOB | Conventional blendstock for oxygenate blending |
| CDD | Cooling Degree Days |
| CDM | Clean Development Mechanism |
| CFC | Chlorofluorocarbon |
| CIF | Cost, insurance, freight |
| C.I.V. | Customs import value |
| CMSA | Consolidated Metropolitan Statistical Area |
| CNG | Compressed natural gas |
| COP | Conference of the parties |
| CPI | Consumer Price Index |
| CWIP | Construction work in progress |
| DSM | Demand-side management |
| EAR | Estimated additional resources |
| EIA | Energy Information Administration |
| EMCS | Energy management and control system |
| EPACT | Energy Policy Act of 1992 |
| EV | Electric vehicle |
| EWG | Exempt wholesale generator |
| F.A.S. | Free alongside ship |
| FASB | Financial Accounting Standards Board |
| FBR | Fast breeder reactor |
| FCCC | Framework Convention on Climate Change |
| FCEV | Fuel cell electric vehicle |
| FERC | Federal Energy Regulatory Commission |
| FID | Final investment decision |
| F.O.B | Free on board (f.o.b.) |
| FPC | Federal Power Commission |
| FSRU | Floating Storage Regasification Unit |
| GAAP | Generally accepted accounting principles |
| GCFB | Gas cooled fast breeder reactor |
| GDP | Gross domestic product |
| GNP | Gross national product |
| GTAB | Gasoline treated as blendstock |
| GTL | Gas to liquids |
| GVWR | Gross vehicle weight rating |
| GW | Gigawatt |
| GWe | Gigawatt-electric |
| GWh | Gigawatthour |
| GWP | Global warming potential |
| H2S | Hydrogen sulfide |
| HCFCs | Hydrochlorofluorocarbons |
| HDD | Heating Degree Days |
| HEV | Hybrid electric vehicle |
| HFCs | Hydrofluorocarbons |
| HGL | Hydrocarbon gas liquids |
| HHV | Higher heating value |
| ICE | Internal combustion engine |
| ICS | Integral collector storage; Internal Collector Storage |
| IDC | Intangible drilling and development costs |
| IOU | Investor-owned utility |
| IPCC | Intergovernmental Panel on Climate Change |
| IPP | Independent power producer |
| IRAC | Imported Refiners' Acquisition Cost |
| ISL | In situ leach mining |
| ISO | Independent system operator |
| JI | Joint Implementation |
| LDC | Local distribution company |
| LHV | Lower heating value |
| LIHEAP | Low Income Home Energy Assistance Program |
| LNG | Liquefied natural gas |
| LPG | Liquefied petroleum gases |
| LRG | Liquefied refinery gases |
| LWR | Light water reactor |
| MPG | Miles per gallon |
| MSA | Metropolitan statistical area |
| MSW | Municipal solid waste |
| MVA | Megavoltamperes |
| MW | Megawatt |
| MWe | Megawatt electric |
| MWh | Megawatthour |
| NAICS | North American Industry Classification System |
| NARUC | National Association of Regulatory Utility Commissioners |
| NERC | North American Electric Reliability Corporation |
| NGL | Natural Gas Liquids |
| NGPA | Natural Gas Policy Act of 1978 |
| NGPL | Natural gas plant liquids |
| NMVOC | Nonmethane volatile organic compounds |
| non-PV | Cells to OEM |
| NO_x | Nitrogen oxides |
| NRECA | National Rural Electric Cooperative Association |
| NURE | National Uranium Resource Evaluation |
| OCS | Outer Continental Shelf |
| OECD | Organization for Economic Cooperation and Development |
| OEM | Original equipment manufacturer |
| OH | Hydroxyl radical |
| OPEC | Organization of Petroleum Exporting Countries |
| OTEC | Ocean thermal energy conversion |
| PADD | Petroleum Administration for Defense District |
| PFCs | Perfluorocarbons |
| PHEV | Plug-in hybrid electric vehicle |
| PMSA | Primary metropolitan statistical area |
| PUD | Public utility district |
| PUHCA | Public Utility Holding Company Act of 1935 |
| PURPA | Public Utility Regulatory PoliciesAct (PURPA) of 1978 |
| PVC | Photovoltaic cell; Polyvinyl chloride |
| PWR | Pressurized-water reactor |
| QF | Qualifying facility |
| RAR | Reasonably assured resources |
| RBOB | Reformulated blendstock for oxygenate blending |
| RD | Research and development |
| RDF | Refuse-derived fuel |
| REA | Rural Electrification Administration |
| RECS | Residential energy consumption survey |
| RFG | Reformulated gasoline |
| RFS | Renewable Fuel Standard |
| R-Value | Thermal resistance |
| RVP | Reid Vapor Pressure |
| SEER | Seasonal energy efficiency ratio |
| SF_6 | Sulfur hexafluoride |
| SIC | Standard Industrial Classification |
| SNG | Synthetic natural gas |
| SO_2 | Sulfur dioxide |
| SPP | Small power producer |
| SPR | Strategic Petroleum Reserve |
| SRC | Solvent Refined Coal |
| SWU | Separative work unit |
| TAME | Tertiary amyl methyl ether - (CH_3)_2(C_2H_5)COCH_3 |
| TBA | Tertiary butyl alcohol - (CH_3)_3COH |
| TPO | Third-party operator |
| TVA | Tennessee Valley Authority |
| TWh | Terawatthour |
| U_3O_8 | Uranium oxide |
| UF_6 | Uranium hexafluoride |
| UMTRA | Uranium Mill Tailings Radiation Control Act (UMTRA) of 1978 |
| U.S. | Operable nuclear unit |
| U.S.S.R. | Union of Soviet Socialist Republics |
| VAWT | Vertical-axis wind turbine |
| VIN | VIN (vehicle identification number) |
| VMT | Vehicle miles traveled |
| VOCs | Volatile organic compounds |
| ZEB | Zero Energy Building |