| AAMI | Association for the Advancement of Medical Instrumentation |
| AAPM | American Association of Physicists in Medicine |
| ACR (ACRii) | Absolute Cryogenic Radiometer (second upgrade) |
| ACS | American Chemical Society |
| ACTS | Automated Computer Time Service |
| ADCL | Accredited Dosimetry Calibration Laboratory |
| ADMIT | Analytical Detection Methods for the Irradiation Treatment of foods |
| AECL | Atomic Energy Canada Limited |
| AEDC | Arnold Engineering Development Center |
| AFB | Air Force Base |
| AFGL | Air Force Geophysics Laboratory |
| AFM | Atomic Force Microscope |
| AFOSR | Air Force Office of Scientific Research |
| AFPL | Air Force Phillips Laboratory |
| AFRRI | Armed Forces Radiobiology Research Institute |
| AI | Associative Ionization |
| AIAA | American Institute for Aeronautics and Astronautics |
| AIGER | American Industry Government Emissions Research Consortium |
| AIP | American Institute of Physics |
| ALG | Advanced Lithography Group |
| AM | amplitude modulation |
| AM1 | First Launch in the morning series of EOS platforms |
| AMMAC | Mexican Metrology Association |
| AMO | Atomic, Molecular and Optical |
| AMS | Accelerator-Mass Spectrometry |
| ANS | American Nuclear Society |
| ANSI | American National Standards Institute |
| ANSOM | Apertureless Near-Field Scanning Optical Microscopy |
| ANVIS | Aviator Night Vision Imaging System |
| APAS | Astrophysical, Planetary and Atmospheric Sciences |
| APHIS | Animal and Plant Health Inspection Service |
| APOMA | American Precision Optics Manufacturers Association |
| APRF | Army Pulse Radiation Facility |
| APS | American Physical Society or Advanced Photon Source |
| APT | Annular Proton Telescope |
| ARO | Army Research Office |
| ARPES | Angle Resolved Photoelectron Spectroscopy |
| ART | Algebraic Reconstruction Technique |
| ASCA | Advanced Satellite for Cosmology & Astrophysics |
| ASCA | Japan-NASA X-ray Satellite |
| ASME | American Society for Mechanical Engineers |
| ASSI | Airglow Solar Spectrometer Instrument |
| ASTER | Advance Spaceborne Thermal Emission and Reflectance Radiometer |
| ASET | Association of Super-advanced Electronics Technologies |
| ASTM | American Society for Testing and Materials |
| AT&T | Atlantic Telephone & Telegraph |
| ATD | Above-Threshold Dissociation |
| ATI | Above-Threshold Ionization |
| ATLAS | Atmospheric Laboratory for Applications and Science |
| ATP | Advanced Technology Program |
| ATW | Accelerator Transmutation of Waste |
| AURA | Association of Universities for Research in Astronomy |
| AXAF | Advanced X-ray Astrophysical Facility |
| AXAF-I | Imaging Advanced X-ray Astrophysical Facility |
| AXAF-S | Spectroscopy Advanced X-ray Astrophysical Facility |
| BARC | Bhabha Atomic Research Centre |
| BB | Blackbody |
| BB | Broad-bandwidth |
| BBIR | Broad Band Infrared |
| BBO | Beta-Barium Borate |
| BBXRT | Broad-Band X-Ray Telescope |
| BCC | Broadband Calibration Chamber |
| BCS | Bardeen-Cooper-Schrieffer theory of superconductivity |
| BCS | Bragg Crystal Spectrometer |
| BEB | Binary-encounter-Bethe |
| BEC | Bose-Einstein Condensation |
| BED | Binary-encounter-dipole |
| BEEM | Ballistic Electron Emission Spectroscopy |
| BEV | Bundesamt für Eich- und Vermessungswesen, Vienna, Austria |
| BFRL | Building & Fire Research Laboratory |
| BGSM | Bowman Gray School of Medicine |
| BIB | Blocked Impurity Band |
| BIFL | Burst Integrated Fluorescence |
| BIPM | Bureau International des Poids et Mesures |
| BL | Beam Line at SURF-III |
| BMDO | Ballistic Missile Defense Organization |
| BNL | Brookhaven National Laboratory |
| BNM | National Bureau of Metrology, France |
| BOMAB | Bottle Manikin Absorber |
| BRAN | Boulder Research and Administrative Network |
| BRDF | Bidirectional Reflectance Distribution Function |
| BSDF | Bidirectional Scattering Distribution Function |
| BSS | Beta Secondary System |
| BSS.2 | Beta-Particle Secondary Standards System |
| BTI | Bubble Technology, Inc. |
| BWO | Backward Wave Oscillator |
| BXR | BMDO Transfer Radiometer |
| CAD | Computer Aided Design |
| CAM | Computer Aided Machining |
| CAMOS | Committee on Atomic, Molecular and Optical Sciences |
| CAO | Carlsbad Area Office |
| CARB | Center for Advanced Research in Biotechnology |
| CARS | Coherent Anti-Stokes Raman Spectroscopy |
| CASS | Calibration Accuracy Support System |
| CAST | Council of Agricultural Science and Technology |
| CBNM | Central Bureau for Nuclear Measurements |
| CCD | Charged Coupled Device |
| CCDM | Consultative Committee for the Definition of the Meter |
| CCDS | Consultative Committee for the Definition of the Second |
| CCE | Consultative Committee on Electricity |
| CCEMRI | Consultative Committee for Ionizing Radiations, CIPM |
| CCG | Calibration Coordination Group |
| CCP6 | Collaborative Computational Project 6 |
| CCPR | Consultative Committee on Photometry and Radiometry |
| CCRI | Comité Consultatif des Rayonnements Ionisants |
| CCTF | Consultative Committee for Time and Frequency |
| CDRH | Center for Devices and Radiological Health |
| CEL | Correlated Emission Laser |
| CEMRC | Carlsbad Environmental Monitoring Research Center |
| CERES | Clouds and Earth's Radiant Energy System |
| CFS | Constant-Final-State Spectroscopy |
| CHEM-1 | Chemistry |
| CIAQ | Committee on Indoor Air Quality |
| CIE | Commission Internationale De L'Éclairage |
| CIPM | International Committee of Weights and Measures, France |
| CIRMS | Council on Ionizing Radiation Measurements and Standards |
| CIRRPC | Committee on Interagency Radiation Research and Policy Coordination |
| CIS | Constant-Initial-State Spectroscopy |
| CMC | Calibration Measurement Capabilities |
| CMR | Colossal Magnetoresistance |
| CNIF | Californium Neutron Irradiation Facility |
| CNRF | Cold Neutron Research Facility |
| CODATA | Committee on Data for Science and Technology |
| CORM | Council for Optical Radiation Measurements |
| COSPAR | Committee on Space Research |
| CPIC | International Physics Center, Elba |
| CPT | conjugation, parity, and time |
| CPU | Central Processing Unit |
| CR | Cascaded Rectifier Accelerator |
| CRADA | Cooperative Research and Development Agreement |
| CRCPD | Conference of Radiation Control Program Directors |
| CRDS | Cavity-Ring-Down Spectroscopy |
| CRI | Cambridge Research Instrumentation |
| CRP | Coordinated Research Program |
| CRT | Cathode Ray Tube |
| CRYRING | Electron Accelerator and Storage Ring Facility (Stockholm, Sweden) |
| CSDA | Continuous-Slowing-Down Approximation |
| CSEWG | Cross Section Evaluation Working Group |
| CSI | Compton Scatter Imaging |
| CSIC | Consejo Superior de Investigaciones Científicas |
| CSIR | Council of Scientific and Industrial Research |
| CSTL | Chemical Science and Technology Laboratory |
| CT | Computed Tomographic |
| CTI | Critical Technologies Institute |
| CU | University of Colorado |
| CVD | Chemical Vapor Deposition |
| cw (CW) | continuous wave |
| CXRO | Center for X-Ray Optics at Berkeley, CA |
| CY | Calendar Year |
| EBIS | Electron Beam Ion Source |
| EBIT | Electron Beam Ion Trap |
| ec | electron-capture |
| ECP | Effective Core Potential |
| ECPR | Electrically-Calibrated Pyroelectric Radiometer |
| ECR | Electron Cyclotron Resonance |
| ECRIS | Electron-Cyclotron-Resonance Ion Source |
| ECS | Energy-Corrected-Sudden |
| ECSED | Electronic Commerce in Scientific and Engineering Data |
| EDX | Energy-Dispersive X-ray Analysis |
| EEEL | Electronics & Electrical Engineering Laboratory |
| EELS | Electron Energy Loss Spectroscopy |
| EEO | Equal Employment Opportunity |
| EEP | Einstein Equivalence Principle |
| EM | Environmental Management |
| ENEA | Ente per le Nuove Tecnologie, L'Energia E L'Ambiente |
| ENDF | Evaluated Nuclear Data File |
| ENDL | Evaluated Nuclear Data Library |
| ENSDF | Evaluated Nuclear Structure Data File |
| EOM | Electro-Optic Modulator |
| EOS | Earth Observing System |
| EPA | Environmental Protection Agency |
| EPIC | Earth Polychromatic Imaging Camera |
| ERATO | Exploratory Research for Advanced Technology Office |
| EROS | Electric Resonance Optothermal Spectrometer |
| ESA | European Space Agency |
| ESB | Electrical Substitution Bolometer |
| ESDIAD | Electron-Stimulated Desorption Ion Angular Distributions |
| ESO | European Southern Observatory |
| ESR | Experimental Storage Ring or Electrical Substitution Radiometer |
| ESR | Electron Spin Resonance (EPR now preferred) |
| ETI | Environmental Technology Initiative |
| ETRAN | Monte Carlo computer code for Electrons and Photons through Extended Media |
| EURADOS | European Radiation Dosimetry Group |
| EURATOM | European Nuclear Energy Organization |
| EUROMET | A European collaboration in measurement standards |
| EUV | Extreme Ultraviolet |
| EUVE | Extreme Ultraviolet Explorer |
| EUVL-LLC | EUV Lithography - Limited Liability Corporation |
| EXAFS | Edge X-ray Absorption Fine Structure |
| FAA | Federal Aviation Administration |
| FACSS | Federation of Analytical Chemistry and Spectroscopy Societies |
| FAD | FASCAL Absolute Detector |
| FARCAL | Facility for Advanced Radiometric Calibrations |
| FASCAL | Facility for Automatic Spectroradiometric Calibrations |
| FCCSET | Federal Coordinating Council Science, Engineering and Technology |
| FCDC | Fundamental Constants Data Center |
| FCPM | Fundamental Constants and Precision Measurements |
| FDA | U.S. Food and Drug Administration |
| FEA | Field-Emitter Array |
| FED | Field-Emitter Display |
| FEL | Free Electron Laser |
| FEMA | Federal Emergency Management Agency |
| FET | Field Effect Transistor |
| FIMS | Fissionable Isotope Mass Standards |
| FIR | Far Infrared |
| FLIR | Forward Looking Infrared Radiometer |
| FM | Frequency Modulation |
| FNR | Ford Nuclear Reactor |
| FOS | Faint Object Spectrograph |
| FOV | Field of View |
| FPC | Fullerene Production Chamber |
| FR | Filtered Radiometer |
| FRET | Fluorescence Resonant Energy Transfer |
| FT | Fourier Transform |
| FT-IRAS | Fourier Transform-Infrared Reflection Absorption Spectroscopy |
| FTIR | Fourier Transform Infrared |
| FTMS | Fourier Transform Microwave Spectroscopy |
| FTMW | Fourier Transform Microwave |
| FTS | Fourier Transform Spectroscopy |
| FUSE | Far Ultraviolet Spectroscopic Explorer |
| FUV | Far Ultraviolet |
| FWHM | Full Width at Half Maximum |
| FY | Fiscal Year |
| HACR | High Accuracy Cryogenic Radiometer |
| HALO | Hypersonic Aircraft Launch Option |
| HBM | Hybrid Bilayer Membrane |
| HCCD | Mono-deuterated Acetylene |
| HDR | High Dose Rate |
| HECT | High-Energy Computed Tomography |
| HFIR | High Flux Isotope Reactor |
| HID | High Intensity Discharge |
| HIRDLS | High Resolution Dynamics Limb Sounder |
| HPGe | High Purity Germanium |
| HPLC | High Pressure Liquid Chromatographic |
| HPS | Health Physics Society |
| HPSSC | Health Physics Society Standards Committee |
| HR3DCT | High Resolution 3-D Computed Tomography |
HRTS | High Resolution Telescope Spectrograph |
| HSST | Heavy Section Steel Technology |
| HST | Hubble Space Telescope |
| HTBB | High-Temperature Black Body |
| HTD | Heat Transfer Division |
| HTS | High-Temperature Superconductivity |
| HUT | Hopkins Ultraviolet Telescope |
| HVL | Half-Value Layer |
| IAEA | International Atomic Energy Agency |
| IAG | International Association of Gravity |
| IAU | International Astronomical Union |
| IC | Integrated Circuit |
| ICAMDATA | International Conference on Atomic and Molecular Data |
| ICP | Inductively Coupled Plasma |
| ICPEAC | International Conference on the Physics of Electronic and Atomic Collisions |
| ICRM | International Committee for Radionuclide Metrology |
| ICRP | International Commission on Radiological Protection |
| ICRU | International Commission on Radiation Units and Measurements |
| ID (id or i.d.) | inside diameter |
| IDMS | Isotope Dilution Mass Spectrometry |
| IEC | International Electrotechnical Commission |
| IEEE | Institute of Electrical and Electronics Engineers |
| IEN | Istituto Elettrotecnico Nazionale (Italy) |
| IES | Illumination Engineering Society |
| IESNA | Illumination Engineering Society of North America |
| IGC | International Gravity Commission |
| IHPRPTP | Integrated High Payoff Rocket Propulsion Technology Program |
| ILL | Institut Laue Langevin |
| ILS | International Laser Spectroscopy |
| IMECE | International Mechanical Engineering Congress and Exposition
|
| IMGC | Istituto di Metrologia "G. Colonnetti" (Italy) |
| IMS | Institute for Molecular Science |
| INDC | International Nuclear Data Committee |
| INISO-TTC | Experimental Radiochromic Film |
| INM | Institute National de Metrologie |
| INMM | Institute for Nuclear Materials Management |
| INMRI-ENEA | Istituto Nazionale di Metrologia delle Radiazioni Ionizzanti - Ente per le Nuove Tecnologie |
| IPNS | Intense Pulsed Neutron Source |
| IPSN | L'Institut de Protection et de Sûreté Nucléaire |
| IPTS | International Practical Temperature Scale |
| IQEC | International Quantum Electronics Conference |
| IQI | Image Quality Indicators |
| IR | Infrared |
| IRAS | Infrared Astronomical Satellite or Infrared Reflection Absorption Spectroscopy |
| IRB | Institutional Review Board |
| IRDCF | Infrared Detector Calibration Facility |
| IRMM | Institute of Reference Materials and Measurements |
| ISCC | Inter-Society Color Council |
| ISO | International Organization for Standardization |
| ISP | International Specialty Products |
| ISCC | Information System to Support Calibrations |
| ISS | International Space Station |
| ISSI | International Space Science Institute (Bern, Switzerland) |
| ITAMP | International Meeting of Theory of Atomic and Molecular Physics |
| ITL | Information Technology Laboratory |
| ITEP | Institute for Theoretical and Experimental Physics |
| ITER | International Thermonuclear Experimental Reactor |
| ITS | International Temperature Scale |
| ITU | International Telecommunication Union |
| IUCr | International Union of Crystallography |
| IUE | International Ultraviolet Explorer |
| IVBT | Intravascular Brachytherapy |
| IVR | Intramolecular Vibrational Relaxation |
| IVR | Intramolecular Vibrational Redistribution |
| IWG | Investigators Working Group |
| LAGOS | Laser Gravitational-Wave Observatory in Space |
| LAMPF | Los Alamos Meson Physics Facility |
| LAMSCAL | Large Area Monochromatic Source for Calibrations |
| LANL | Los Alamos National Laboratory |
| LANSCE | Los Alamos Neutron Scattering Center |
| LASP | Laboratory for Atmospheric and Space Physics, University of Colorado |
| LBIR | Low Background Infrared Radiometry |
| LBL | Lawrence Berkeley Laboratory |
| LBRS | Low Background Reference System |
| LCD | Liquid Crystal Display |
| LCIF | Laser-Collision-Induced Fluorescence |
| LED | Light Emitting Diode |
| LEED | Low Energy Electron Diffraction |
| LEI | Laser-Enhanced Ionization |
| LET | Linear Energy Transfer |
| LF | Low Frequency |
| LIF | Laser Induced Fluorescence |
| LIGO | Laser Interferometric Gravitational-Wave Observatory |
| LISA | Laser Interferometer Space Antenna |
| LLNL | Lawrence Livermore National Laboratory |
| LMR | Laser Magnetic Resonance |
| LMRI | Laboratoire de Mesure des Rayonnements Ionisants (France) |
| LO | Laser Optics |
| LORAN-C | A Radio Navigation System Operated by the U.S. Coast Guard |
| LPM | Light-Particle Monitor |
| LPRI | Laboratoire Primaire des Rayonnements Ionisants, Gif-sur-Yvette, France |
| LPRT | Light-Pipe Radiation Thermometers |
| LPTF | Laboratoire Primaire du Temps et des Fréquencies |
| LS | Liquid Scintillation |
| LSC | Liquid Scintillation Counting |
| LTE | Local Thermodynamic Equilibrium |
| LT | Low-Temperature |
| LTEC | Lamp Testing Engineers Conference |
| LTG | Low-Temperature Growth |
| LVIS | Low Velocity Intense Source |
| LWIR | Long Wave Infrared |
| MARLAP | Multi-Agency Radiological Laboratory Procedures |
| MARS | Multiple-Angle Reference System |
| MBE | Molecular Beam Epitaxy |
| MBIR | Medium Background Infrared Facility |
| MBOS | Molecular-Beam Optothermal Spectrometer |
| MCNP | Monte Carlo Neutron Photon (computer code) |
| MCQDT | Multi Channel Quantum Defect Theory |
| MCT | Mercury-cadmium-telluride |
| MCU | Mobile Calibration Unit |
| MDRF | Materials Dosimetry Reference Facility |
| MEA | Materials Engineering Associates |
| MEA | membrane electrode assembly |
| MEDEA | Microelectronics Development for European Applications |
| MEIBEL | Merged Electron-Ion Beam Energy Loss |
| MEL | Manufacturing Engineering Laboratory |
| MEMS | Micro Electro Mechanical Systems |
| MET | Medium Energy Telescope |
| MEVVA | Metal Vapor Vacuum Arc |
| MIDAS | Modular Interactive Data Acquisition System |
| MIL | Military |
| MIM | Metal-Insulator-Metal (Diode) |
| MIRD | Medical Internal Radiation Dose (committee) |
| MIRF | Medical and Industrial Radiation Facility |
| MISR | Multi-angle Imaging Spectroradiometer |
| MIT | Massachusetts Institute of Technology |
| MJD | Modified Julian Date |
| MMI | Mallinckrodt Medical, Inc. |
| MOBY | Marine Optical Buoy |
| MOCVD | Metal Organic Chemical Vapor Deposition |
| MODIL | Manufacturing Operations Development & Integration Laboratory |
| MODIS | Moderate Resolution Imaging Spectrometer |
| MOEMS | Micro Optp Electro Mechanical Systems |
| MOKE | Magneto-Optical Kerr Effect |
| MOPITT | Measurement of Pollution In The Troposphere |
| MOS | Marine Optical System or Marine Optical Spectrograph |
| MOSFET | Metal Oxide Semiconductor Field Effect Transistor |
| MOT | Magneto Optical Trap |
| MQDT | Multichannel Quantum Defect Theory |
| MPD | Multiphoton Detector |
| MPI | Multiphoton Ionization |
| MPP | Multi-Pinned Phasing |
| MQA | Measurement Quality Assurance |
| MQDT | Multichannel Quantum Defect Theory |
| MQSA | Mammography Quality Standards Act |
| MRA | Mutual Recognition Arrangement |
| MRI | Magnetic Resonance Imaging |
| MRT | Minimal Resolvable Temperature |
| MSEL | Materials Science and Engineering Laboratory |
| MSX | Midcourse Space Experiment |
| MTG | Methanol To Gasoline |
| MURR | University of Missouri Research Reactor |
| MW | Microwave |
| NAMP | National Analytical Management Program |
| NAMT | National Advanced Manufacturing Testbed |
| NAPM | National Association of Photographic Manufacturers |
| NAS | National Academy of Sciences |
| NAS/NRC | National Academy of Sciences/National Research Council |
| NASA | National Aeronautics and Space Administration |
| NATO | North Atlantic Treaty Organization |
| NBS | National Bureau of Standards, now NIST |
| NBS-4 | Older Primary Frequency Standard (retains the NBS name) |
| NBS-6 | Previous Primary Frequency Standard (retains the NBS name) |
| NBSR | National Bureau of Standards' Reactor (retains the NBS name) |
| NCAR | National Center for Atmospheric Research |
| NCI | National Cancer Institute |
| NCNR | NIST Center for Neutron Research |
| NCRP | National Council on Radiation Protection and Measurements |
| NCSCANS | National Steering Committee for the Advanced Neutron Source |
| NCSL | National Conference of Standards Laboratories |
| ND | Neutron Density |
| NDT | Nondestructive Testing |
| Nd:YAG | Neodymium: Yttrium-Aluminum-Garnet (YAG doped with Nd) |
| NEANDC | Nuclear Energy Agency Nuclear Data Committee |
| NEANSC | Nuclear Energy Agency Nuclear Science Committee |
| NEC | Nippon Electric Corporation |
| NED | Nuclear Effects Directorate |
| NEI | Nuclear Energy Institute |
| NELAC | National Environmental Laboratory Accreditation Conference |
| NEOS | Newport Electro-Optic Systems |
| NERI | Nuclear Energy Research Initiative
|
| NESDIS | National Environmental Satellite Data and Information Service |
| NEWRAD | New Radiometry |
| NG6, NG-6 | Monochromatic Beam Line near the end of NG6 |
| NG6M | Neutron Guide No. 6 |
| NG7 | Neutron Guide No. 7 |
| NGS | National Geological Society |
| NICE-OHMS | Noise-Immune Cavity Enhanced Optical Heterodyne Molecular Spectroscopy |
| NI&D | Nuclear Interactions and Dosimetry |
| NIDR | National Institute of Dental Research |
| NIF | National Ignition Facility |
| NIH | National Institutes of Health |
| NIM | Normal-Incidence Monochromator or National Instrumentation Methods |
| NIOF | Neutron Interferometry and Optics Facility |
| NIPDE | National Initiative for Product Data Exchange |
| NIR | Near Infrared |
| NIST | National Institute of Standards and Technology |
| NIST-7 | Former NIST Primary Frequency Standard |
| NIST-F1 | Current NIST Primary Frequency Standard |
| NISTAR | NIST Advanced Radiometer |
| NMI | National Metrology Institute or National Measurement Institute |
| NML | National Measurement Laboratory (Japan) |
| NMR | Nuclear Magnetic Resonance |
| NMS | Natural Matrix Standard |
| NOAA | National Oceanic and Atmospheric Administration |
| NOAO | National Optical Astronomy Observatory |
| NOBCChE | National Organization for the Professional Advancement of Black Chemists and Chemical Engineers |
| NORA | Non-Overlapping Redundant Array |
| NORAMET |
A North American regional collaboration in national measurement standards and services |
| NPL | National Physical Laboratory (U.K.) |
| NPOESS | National Polar-orbiting Operational Environmental Satellite |
| NPSS | Nuclear and Plasma Sciences Society |
| NRC | National Research Council |
| NRC | Nuclear Regulatory Commission |
| NRCC | National Research Council Canada |
| NREL | National Renewable Energy Laboratory |
| NRIP | NIST Radiochemistry Intercomparison Program |
| NRL | Naval Research Laboratory |
| NRLM | National Research Laboratory of Metrology (Japan) |
| NRRS | Near Resonance Rayleigh Scattering |
| NSA | National Security Agency |
| NSBP | National Society of Black Physicists |
| NSCANS | National Steering Committee for the Advanced Neutron Source |
| NSF | National Science Foundation |
| NSLS | National Synchrotron Light Source, Brookhaven National Laboratory |
| NSOM | Near-Field Scanning Optical Microscopy |
| NTSB | National Transportation Safety Board |
| NVIS | Night Vision Imaging System |
| NVLAP | National Voluntary Laboratory Accreditation Program |
| OAI | Optical Associates, Inc. |
| OCLI | Optical Cooling Laboratory Incorporated |
| OD | Optical Density |
| OE | Optical Engineering |
| OFS | Österreichisches Forschungszentrum |
| OIML | International Organization of Legal Metrology |
| OMEGA | 24-Beam Laser Facility at Rochester |
| OMH | National Office of Measures (Hungary) |
| ONR | Office of Naval Research |
| OPA | Optical Parametric Amplifier |
| OPO | Optical Parametric Oscillator |
| OPTCON | International conference sponsored by 3
agencies: Optical Society of America; Society of Photo-optical
Instrumentation Engineers; and Institute of Electrical and Electronics
Engineers |
| ORM | Office of Radiation Measurement |
| ORELA | Oak Ridge Electron Linear Accelerator |
| ORNL | Oak Ridge National Laboratory |
| OSA | Optical Society of America |
| OSL | Optical Stimulated Luminescence |
| OSRD | Office of Standard Reference Data |
| OSTP | Office of Science and Technology Policy |
| OTD | Optical Technology Division |
| PA | Proton Affinity |
| PADE | Parallel Applications Development Environment |
| PARCS | Primary Atomic Reference Clock in SPACE |
| PC | Personal Computer |
| PCB | polychlorinated biphenyl |
| PDC | Parametric down-conversion |
| PDE | Product Data Exchange |
| PDML | Photovoltaic Device Measurement Laboratory |
| PE | Performance Evaluation |
| PECVD | Plasma-Enhanced Chemical Vapor Deposition |
| PEM | polymer-electrolyte-membrane |
| PES | Photoelectron Spectroscopy |
| PET | Positron Emission Tomography |
| PFID | Perturbed Free Induction Decay |
| PID | Proportional, Integral, and Derivative |
| PIXE | Particle Induced X-ray Emission |
PL | Physics Laboratory |
| PM | phase modulation |
| PMG | Precision Measurement Grant |
| PMMA | polymethylmethacrylate |
| PMS | Particle Measurement System |
| PMT | Photomultiplier Tube |
| PNL | Pacific Northwest Laboratory |
| PNNL | Pacific Northwest National Laboratory |
| PNR | Polarized Neutron Reflectivity |
| POC | Physical Optics Corporation |
| POP | Plasma Oscillation Probe |
| POPA | Panel on Public Affairs of American Physical Society |
| PREP | Professional Research Experience Program |
| PRF | Petroleum Research Fund |
| PRL | Physical Review Letters |
| PRM | Precision Radiation Measurement |
| PS | Polystyrene |
| PSD | Photon-Stimulated Desorption |
| PSL | Polystyrene-latex |
| PT | Performance Testing |
| PTB | Physikalisch-Technische Bundesanstalt (Germany) |
| PTCA | Percutaneous Transluminal Coronary Angioplasty |
| PTFE | Polytetrafluoroethylene |
| PTI | Proxima Therapeutics, Inc. |
| PUD | Paired Uranium Detector |
| PWR | Pressurized-Water Reactor |
| PWS | Primary Working Standard |
| PZT | Piezoelectric Transducer |
| SACR | Space-based Active Cavity Radiometer |
| SAM | Self-Assembled Monolayer |
| SANS | Small-Angle Neutron Scattering |
| SBIR | Small Business Innovation Research |
| SCAMPY | Scanning Micro Pyrometer |
| SCATMECH | Consortium of 14 U.S. Semiconductor Manufacturers |
| SCC | Standards Coordinating Committee or Spectral Calibration Chamber |
| SCF | Spectral Comparator Facility |
| SCLIR | Secondary Calibration Laboratories for Ionizing Radiation |
| SDI | Strategic Defense Initiative |
| SDIO | Strategic Defense Initiative Organization |
| SDL | Space Dynamics Laboratory |
| SEAWIFS (SeaWiFS) | Sea-Viewing of Wide Field Sensor |
| SEBA | Standards' Employees Benefit Association |
| SEM | Scanning Electron Microscope |
| SEMATECH | Consortium of 14 U.S. Semiconductor Manufacturers |
| SEMPA | Scanning Electron Microscopy with Polarization Analysis |
| SFA | Sachs Freeman and Associates |
| SFCP | Special Foreign Currency Program |
| SFG | Sum Frequency Generation |
| SI | Système International d' Unités
or International System of Units |
| SIA | Semiconductor Industry Association |
| SID | Society for Information Display |
| SIMS | Secondary Ion Mass Spectrometry |
| SIRCUS | Spectral Irradiance and Radiance Calibration with Uniform Sources |
| SIRREX-3 | SeaWiFS Intercalibration Round-Robin Experiment |
| SKACR | Superconducting Kinetic-inductance Absolute Cryogenic Radiometer |
| SLM | Synthetic Layer Microstructure |
| SME | Solar Mesosphere Explorer |
| SM | Single Molecule |
| SNOM | Scanning Near Field Optical Microscope |
| SOG | Spin-on Glass |
| SOLSPEC | Solar Spectrometer |
| SOLSTICE | Solar Stellar Irradiance Comparison Experiment |
| SPIE | Society of Photo-optical Instrumentation Engineers |
| SPP | Storage Photostimulable Phosphor |
| SQL | Structured Query Language |
| SRAM | Static Random Access Memory |
| SRDP | Standard Reference Data Program |
| SRM | Standard Reference Material |
| SSBUV | Shuttle Solar Backscatter Ultraviolet |
| SSC | Superconductor Super Collider |
| SSDL | Secondary Standard Dosimetry |
| SSPM | Solid State Photomultipliers |
| SSRCR | State Suggested Regulations for Controlling Ionizing Radiations |
| SSTR | Solid State Track Recorder |
| SSUV | Shuttle Solar Ultraviolet |
| STARR | Spectral Tri-function Automated Reference Reflectometer |
| STD | Standard |
| STM | Scanning Tunneling Microscope |
| STP | Standard Temperature Pressure |
| STScI | Space Telescope Science Institute |
| SUNY | State University of New York |
| SURF | Summer Undergraduate Research Fellowship program |
| SURF-III (SURF II) | The NIST Synchrotron Ultraviolet Radiation Facility Electron Storage Ring |
| SUSIM | Solar Ultraviolet Spectral Irradiance Monitor |
| SVGL | Silicon Valley Group Lithography |
| SWIXR | Short Wave Infrared Transfer Radiometer |
| SWIR | Short Wave Infrared |
| SXR | SeaWiFS Transfer Radiometer |
| TAG | Technical Advisory Group |
| TAI | International Atomic Time |
| TAMOC | Theoretical Atomic, Molecular, and Optical Physics Community |
| TASSII | Total and Spectral Solar Irradiance Investigation |
| TC | Technical Committee |
| TCAP | Time-Correlated Associated Particle |
| TDCR | Triple-to-Double Coincidence Ratio |
| TEPC | Tissue Equivalent Proportional Counter |
| TEXT | Texas Experimental Tokamak |
| TFTC | Thin-Film Thermocouple |
| TFWM | transient four-wave-mixing |
| TGM | Toroidal-Grating Monochromator |
| TIMED | Thermosphere Ionosphere Mesosphere Energetics and Dynamics |
| TLC | Thin Layer Chromatography |
| TLD | Thermoluminescent Detector |
| TMA | Tri-methyl-aluminum |
| TOF | Time-of-Flight Spectrometer |
| TOMS | Total Ozone Mapping Spectrometer |
| TOP | Time-Orbiting-Potential Trap |
| TPB | Tetraphenyl Butadiene |
| TPD | Temperature Programmed Desorption |
| TQM | Total Quality Management |
| TRIGA | Training, Research and Isotope Reactor, General Atomics |
| TRU | Transuranic |
| TuFIR | Tunable Far Infrared (Radiation) |
| TXR | Thermal-infrared Transfer Radiometer |
| WAFAC | Wide-Angle Free-Air Chamber |
| WERB | Washington Editorial Review Board |
| WG | Working Group |
| WHC | Washington Hospital Center |
| WHO | World Health Organization |
| WIPP | Waste Isolation Pilot Plant |
| WISE | Women in Science and Engineering |
| WKB | Wentzel-Kramers-Brillouin |
| 4WM | Four Wave Mixing |
| WMO | World Metrological Organization |
| WPMA | Working Party on Measurement Activities |
| WSTC | Westinghouse Science and Technology Center |
| WWV | Call letters for NIST short-wave radio station in Colorado |
| WWVB | Call letters for NIST lf radio station in Colorado |
| WWVH | Call letters for NIST short-wave radio station in Hawaii |
| WWW (www) | World Wide Web |
| WYSIWYG | What You See Is What You Get |
