| N | Asparagine (amino acid) |
| N | Newton |
| n. F. | neuer Fassung |
| Na | Sodium (in a pharmaceutical compound) |
| NA | Neutron Activation |
| NA | Numerical Aperture |
| NA | Not applicable |
| NA | Italian WWI term: chlorpicrin |
| NAA | Neutron Activation Analysis |
| NAACP | National Ass'n. for the Advancement of Colored People |
| NABT | National Association of Biology Teachers (US) |
| NACA | National Advisory Council on Aeronautics (later NASA) |
| NAD | Nicotinamide Adenine Dinucleotide |
| NADH | Nicotinamide Adenine Dinucleotide (Reduced) |
| NADP | Nicotinamide Adenine Dinucleotide Phosphate |
| NADPH | Nicotinamide Adenine Dinucleotide Phosphate (Reduced) |
| NAE | (US) National Academy of Engineering |
| NAFTA | North American Free Trade Agreement |
| NAI | 1-acetylimidazole |
| NAICS | Noth American Industrial Classification System |
| Nal | Naphthylalanine |
| NAMAS | National Measurement Accreditation Service (England; lab accreditation) |
| NAMUR | Normen-Arbeitsgemeinschaft fuer Mess- und Regeltechnik in der |
| NANA | N-acetylneuraminic acid |
| NANDA | New Animal Drug Application |
| NAPHCC | National Ass'n. of Plumbing, Heating and Cooling Contractors |
| NAPM | National Association of Purchasing Management |
| NARD | National Association of Retail Druggists (US) |
| NARTS | Naval Air Rocket Test Station (Dover, NJ); LRPL after 1960 |
| NAS | New Active Substance (UK, pharmaceuticals) |
| NAS | National Academy of Sciences (US) |
| NAS | National Academy of Sciences (US) |
| NASBA | Nucleic Acid Sequence Based Amplification |
| NASD | National Association of Securities Dealers |
| NASDAQ | National Association of Securities Dealers Automated Quotations |
| NAV | Net asset value |
| NBA | National Basketball Association |
| NBC | Nuclear, Biological, Chemical (weapons) |
| NBC | National Broadcasting Company |
| NBD | N-(7-nitrobenz-2-oxa-1,3-diazol-4-yl)- (fluorescent substituent) |
| NBFM | Narrow-Band Frequency Modulation |
| Nbg | Norbornylglycine |
| NBS | (U. S.) National Bureau of Standards (now NIST) |
| NBT | Nitroblue tetrazolium |
| NBV | Net book value |
| NC | Normally Closed (switch) (closed: current can flow) |
| NC | Chlorpicrin and tin tetrachloride (Engl. WWI chem. agent) |
| NC | NitroCellulose |
| NCBI | National Center for Biotechnology Information |
| NCCLS | (US) National Committee for Clinical Laboratory Standards |
| NCDA | National Center for Drug Analysis |
| NCE | New Chemical Entity |
| NCHGR | National Center for Human Genome Research |
| NCI | National Cancer Institute |
| NCIB | National Collection of Industrial Bacteria (British) |
| NCN | Nitro-Carbo-Nitrate |
| NCPF | National Collection of Pathogenic Fungi (British) |
| NCS | Newborn calf serum |
| NCTC | National Collection of Type Cultures(microbiology) (British) |
| NCTR | National Center for Toxicological Research |
| NDA | New Drug Application(US FDA) |
| NDT | Nondestructive testing |
| NEA | Nuclear Energy Agency |
| NEA | National Educational Association (US teachers union) |
| NEC | Nippon Electric Corporation |
| NEC | National Electrical Code(US) |
| NEJM | New England Journal of Medicine |
| NELAC | (US) Nat'l. Environmental Laboratory Accreditation Conference |
| NEMA | National Electrical Manufacturers Association (US) |
| NEON | National Ecological Observatory Network |
| NEP | 1-Ethyl-2-pyrrolidinone |
| NEPIS | 2-Ethyl-5-phenylisoxazolium-3'-sulfonate |
| NESC | National Electrical Safety Code |
| NF | National Formulary (pharmaceutical ingredients) |
| NFL | National Football League |
| NFPA | National Fire Protection Association (US) |
| NG | Nasogastric(tube) |
| NG | Nitroglycerin |
| NG | National Guard |
| NG | No Good |
| NGFA | National Grain and Feed Association |
| NGU | Non-gonococcal urethritis |
| NHE | Normal Hydrogen Electrode |
| NHL | Non-Hodgkins lymphoma |
| NIAID | National Institute of Allergy and Infectious Diseases |
| NIAMSD | Nat'l. Inst. of Arthritis and Musculoskeletal and Skin Diseases |
| NIBSC | National Institute of Biological Standards and Control (UK) |
| NIC | Network Information Center |
| NICHHD | Nat'l. Inst. of Child Health and Human Development |
| NICMOS | Near Infrared Camera and Multi-Object Spectrometer |
| NIDDKD | Nat'l. Inst. of Diabetes and Digestive and Kidney Diseases |
| NIDDM | Non-insulin-dependent Diabetes mellitus |
| NIDR | National Institute of Dental Research |
| NIEHS | National Institute of Environmental Health Sciences |
| NIGMS | National Institute of General Medical Sciences (US) |
| NIH | National Institutes of Health (US) |
| NIH | Not Invented Here |
| NIHCM | National Institute for Health Care Management |
| NIMBY | Not in my back yard! |
| NIOSH | National Institute of Occupational Safety and Health (US) |
| NIR | Near Infrared |
| NIST | National Institute of Standards and Technology |
| Nle | Norleucine |
| NLEA | Nutrition Labeling and Education Act (1990, US) |
| NLO | NonLinear Optics (or Optical) |
| NLRA | National Labor Relations Act (US) |
| NLRB | National Labor Relations Board (US) |
| NLS | Nonlinear Schrodinger Equation |
| NMCS | National military command system (US) |
| NME | New Molecular Entity |
| NMi | Netherlands Measurement Institute |
| NMP | N-methylpyrrolidone |
| NMLRA | National Muzzle-Loading Rifle Association (US) |
| NMR | Nuclear Magnetic Resonance |
| NMRI | Nuclear Magnetic Resonance Imaging |
| NNI | National Nanotechnology Initiative |
| NNTP | Network News Transfer Protocol(Internet) |
| NO | Chemical symbol for nitric oxide (not an abbreviation) |
| NO | Normally Open (switch) (open: current cannot flow) |
| NOD | Non-obese diabetic |
| NOEC | No Effect Concentration |
| NOEL | No Effect Limit |
| NOL | Naval Ordnance Laboratory |
| NOS | Not Otherwise Specified |
| NOTS | Naval Ordnance Test Station, China Lake CA |
| NOX | Nitrogen oxides (usually in air pollution context) |
| NPA | National Pharmaceutical Alliance |
| NPF | Nurse Prescribers' Formulary (UK) |
| NPK | Nitrogen, Phosphorus, Potassium (content in fertilizers) |
| NPN | Normal Propyl Nitrate(rocket propellant candidate) |
| NPN | Non-protein nitrogen |
| NPO | Nothing by mouth(originally medical Latin) |
| NPS | National Park Service |
| NPT | National Pipe Thread |
| NPT | Neomycin phosphotransferase |
| NPV | Net Present Value |
| NRA | National Rifle Association of America |
| NRA | National Recovery Act (ca. 1932) |
| NRC | National Research Council (US) |
| NRC | Nuclear Regulatory Commission |
| NREN | National Research & Education Network (fiber optical system) |
| NRI | National Research Initiative |
| NRV | Net realizable value |
| NRZ | Non-return to zero |
| NSAID | Non-steroidal anti-inflammatory drug |
| NSB | National Science Board (US) |
| NSERC | Natural Science and Engineering Research Council (Canada) |
| NSF | National Science Foundation (US) |
| NSOM | Near-field scanning optical microscopy |
| NSPC | National Standard Plumbing Code |
| NSSA | National Skeet Shooting Association (US) |
| NSSF | National Shooting Sports Foundation (US) |
| NSTC | National Science and Technology Council |
| NTA | Nitrilotriacetic acid |
| NTD | Neural Tube Defects |
| NTG | Nitroglycerin(medical) |
| NTIS | National Technical Information Service |
| NTIS | (U. S.) National Technical Information Service |
| NTP | National Toxicology Program |
| NTSB | National Transportation Safety Board |
| NVH | Noise, Vibration, Harshness (automobile) |
| NVLAP | National Voluntary Laboratory Accreditation Program |
| NVOC | Nitroveratryloxycarbonyl |
| NYSE | New York Stock Exchange |
| NYU | New York University |
Copyright © 2010 Denzel Dyer, all rights reserved.
