| Term | Definition / Meaning / Stand for |
| ADB |
Asian Development Bank |
| AFOLU |
Agriculture, Forestry, and Other Land Use |
| AGI |
Artificial Gas Injection |
| ALE |
Advanced Liquid Electrode |
| ALP |
Alternative Licensing Process |
| AMCA |
Air Movement and Control Association |
| AP |
Air Pollution |
| APF |
Annual Performance Factor |
| AQ |
Air Quality |
| AQMD |
Air Quality Management District |
| ARRA |
American Recovery and Reinvestment Act |
| ASME |
American Society of Mechanical Engineers |
| AV |
Autonomous Vehicle |
| BCCS |
Bioenergy with Carbon Capture and Storage |
| BCF |
Billion Cubic Feet (of Natural Gas) |
| BFO |
Biofuel Oil |
| BJH |
Brunauer-Emmett-Teller (BET) Adsorption Isotherm |
| BKWH |
Billion Kilowatt-Hours |
| BMU |
German Federal Ministry for the Environment |
| BMU |
Building Maintenance Unit |
| BOP |
Balance of Plant (Power Systems) |
| BP |
British Petroleum |
| BSF |
Biomass Solid Fuel |
| BST |
Biomass Steam Turbine |
| BTO |
Building Technologies Office (U.S. DOE) |
| CAV |
Connected and Autonomous Vehicles (for energy efficiency) |
| CCAR |
Climate Change Adaptation and Resilience |
| CCM |
Carbon Credit Mechanism |
| CDS |
Carbon Data System |
| CEE |
Center for Energy Efficiency |
| CEMS |
Continuous Emission Monitoring System |
| CERE |
Center for Energy and Resource Efficiency |
| CETF |
Clean Energy Transition Fund |
| CHP |
Combined Heat and Power |
| CIE |
Clean Industry Efficiency |
| CPI |
Carbon Pricing Initiative |
| CREF |
Carbon Reduction and Energy Framework |
| CRES |
Community Renewable Energy System |
| CSO |
Carbon Storage Operations |
| CSPP |
Climate Smart Power Program |
| CST |
Concentrated Solar Thermal |
| CVC |
Climate Vulnerability and Capacity |
| CWMP |
Climate and Water Management Plan |
| DCAI |
Decarbonization and Circularity Action Initiative |
| DCCN |
Decarbonization and Climate Change Network |
| DCEI |
Decentralized Clean Energy Initiative |
| DCR |
Decarbonization Roadmap |
| DCSP |
Decentralized Carbon Sequestration Program |
| DHP |
Distributed Heat Pump |
| DHW |
Domestic Hot Water |
| DIF |
Decentralized Innovation Fund |
| DIP |
Decarbonization Investment Plan |
| DLMP |
Distributed Locational Marginal Pricing |
| DLS |
Dynamic Load Shedding |
| DNO |
Distribution Network Operator |
| DOD |
Depth of Discharge |
| DPC |
Decarbonized Power Community |
| DRE |
Decentralized Renewable Energy |
| DREZ |
Distributed Renewable Energy Zone |
| DRMS |
Demand Response Management System |
| DSM |
Demand-Side Management |
| DWMS |
Decentralized Water Management System |
| EA |
Environmental Assessment |
| ECA |
Energy Conservation Act |
| ECO |
Energy Company Obligation |
| ECOWAS |
Economic Community of West African States (Energy Policy) |
| EER |
Energy Efficiency Ratio |
| EGI |
Energy Governance Initiative |
| EGR |
Exhaust Gas Recirculation |
| EHP |
Energy Heat Pump |