NREL—National Renewable Energy Laboratory (U.S.)
NRMRL—National Risk Management Research
Laboratory (U.S.)
NRPB—National Radiological Protection Board (UK)
NRR—Net Reproduction Rate
NRT—National Response Team (U.S.)
NSERC—National Science and Engineering Research
Council (Canada)
NSF—National Science Foundation (U.S.)
NFSOM—Near-Field Scanning Optical Microscopy
NSPE—National Society of Professional Engineers (U.S.)
NSPS—New Source Performance Standards (U.S.)
NSR—New Source Review
NTA—Nitrilotriacetic Acid
NTI—Nuclear Threat Initiative
NTN—National Trends Network
NTNU—Norwegian University of Science and Technology
NTP—National Toxicology Program (U.S.)
NTS—Not to Scale
NTSB—National Transportation Safety Board (U.S.)
NTTC—National Technology Transfer Center (U.S.)
NTU—Nephelometric Turbidity Unit
Nu—Nusselt Number
NURP—National Urban Runoff Program (U.S.)
NWP—Numerical Weather Prediction
NWR—National Wildlife Refuge (U.S.)
NWS—National Weather Service (U.S.)
NWTRB—Nuclear Waste Technical Review Board (U.S.)OA—Overfire Air
OBO—Ore-Bulk-Oil
OCAG—Off-Site Consequences Analysis Guidance (U.S.)
OCCM—Office of Air Quality Planning and Standards
Control Cost Manual (U.S.)
OCEF—Overseas Economic Cooperation Fund (Japan)
OCGCM—Ocean Coupled General Circulation Model
OCP—Organopesticides
OCPSF—Organic Chemicals, Plastics and Synthetic Fibers
OCS—Outer Continental Shelf
O.D.—Optical Density
ODA—Overseas Development Agency (UK)
ODP—Ocean Drilling Programme (Australia)
ODP—Ozone Depletion Potential
ODS—Ozone Depleting Substance
OECD—Organization for Economic Cooperation and
Development
OEL—Occupational Exposure Limit
O8CDD—Octochloro Dibenzo-p-Dioxin
O8CDF—Dibenzofuran
OEM—Office of Emergency Management (U.S.)
OEM—Original Equipment Manufacturer
OERR—Office of Emergency and Remedial Response
(U.S.)
OES—Occupational Exposure Standard (UK)
OES—Office of Endangered Species (U.S.)
OFA—Overfire Air
OHS—Occupational Hygiene Secretariat (UK)
OH & S—Occupational Health and SafetyOIE—Organisation Internationale des Epizooties
OIES—Oxford Institute for Energy Studies (UK)
OLED—Organic Light-Emitting Diode
OLR—Organic Loading Rate
O & M—Operation and Maintenance
OMB—Office of Management and Budget (U.S.)
OMG—Old Mixed Grade
OMT—Open Market Trading
OMTR—Open Market Trading Credits Rule (U.S.)
OMZ—Oxygen-Minimum Zone
ONBC—Overnight Nutrient Broth Culture
ONDRAF—Waste Disposal Organization (Belgium)
OP—Organophosphate
OPA—Oil Pollution Act (U.S.)
OPCW—Organization for Prevention of Chemical Warfare
OPEC—Organization of Petroleum Exporting Countries
OPETS—Organization for the Promotion of Energy
Technologies (EU)
OP-FTIR—Open-Path Fourier Transform Infrared
OPLA—High Level Waste Disposal Program (Holland)
OPS—Office of Pipeline Safety (U.S.)
OR—Odds Ratio
ORD—Office of Research and Development (U.S.)
ORI—Office of Research Integrity (U.S.)
ORNL—Oak Ridge National Laboratory (U.S.)
ORP—Oxidation-Reduction Potential
ORSANCO—Ohio River Sanitation Commission (U.S.)
OSAT—On-Site Assistance Team (EC)
OSHA—Occupational Safety and Health Act (U.S.)
OSHA—Occupational Safety and Health Administration
(U.S.)
OSPAR—Oslo-Paris Agreement
OSPM—Operational Street Pollution Model
OSPREY—Ocean Swell Powered Renewable Energy (UK)
OST—Office of Science and Technology (UK) (U.S.)
OSW—Office of Saline Water (U.S.)
OSWER—Office of Solid Waste and Emergency Response
(U.S.)
OTA—Office of Technology Assessment (U.S.)
OTEC—Ocean Thermal Energy Conversion
OTR—Oxygen Transfer Rate
OTR—Ozone Transport Region (U.S.)
OUR—Oxygen Uptake Rate
OVA—Organic Vapor Analysis
OW—Oil in Water
Ox—Total OxidantsP—Polystyrene
Pa—Pascal
PA—Polymide
PABA—Para-Amino-Benzoic Acid
PAC—Polyaluminum Chloride
PAC—Powered Activated Carbon
PAC1—Polyaluminum Chloride
PACT—Programme for Alternative Fluorocarbon Toxicity
Testing
PAFC—Phosphoric Acid Fuel Cell
PAH—Polynuclear Aromatic Hydrocarbons1366 ACRONYMS AND ABBREVIATIONS
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