BTU		British thermal unit
CCGT		Combined cycle gas turbine
EJ		Exajoule
EU		European Union
GDP		Gross domestic product
GIF		Generation IV International Forum
GJ		Gigajoule
HID		Human Development Index
HVAC		Heating, ventilation, and air conditioning
IAC		InterAcademy Council
IAEA		International Atomic Energy Agency
IEA		International Energy Agency
IGCC		Integrated gasification combined cycle
IPCC		Intergovernmental Panel on Climate Change
kWh		Kilowatt-hour
Mtoe		Million ton oil equivalent
MWe		Megawatt electricity
NGO		Nongovernmental organization
OECD		Organization for Economic Coordination and Development
PJ		Petajoule
PPP		Purchasing power parity
PV		Photovoltaic
R&D		Research and development
RD&D		Research, development, and demonstration
S&T		Science and technology
TPES		Total primary energy supply
TWh		Terawatt-hour