A

Acronym List

Acronym Full name Comments
AA access authorization
AA accountable/activity area
AA activity area
AA adverse action
AA affirmative action
AA assistant administrator
(A3) armor/anti-armor
(AA3) Accident Analysis Computer Program
AAA American Arbitration Association
AAAS American Association for the Advancement of Science
AACR Anglo-American cataloging rules
AACS airborne activity confinement system
AADT average annual weekday traffic
AAEE American Academy of Environmental Engineers
AA/EEO affirmative action/equal employment opportunity
AAG Association of American Geographers
AAH advanced attack helicopter
AALC amphibious assault landing craft
AAM airborne activity monitor
AAM air-to-air missile
AAOE Airborne Antarctic Ozone Experiment
AAP Aviation Applications Program  
AAP Atmospheric Analysis and Prediction Division new science division at NCAR 4/73
AAP affirmative action program
AAP asbestos action program
AAR affirmative action representative
AARADCOM US Army Armanents R&D Command
AARC Alliance for Acid Rain Control
AARP American Association of Retired People
AAS American Astronomical Society
AAS acid addition system
AAS atomic absorption spectroscopy
AASE Airborne Arctic Stratospheric Expedition NASA/NOAA/NSF/CMA
AASM Advanced Air to Surface Missile
AASO Army Aeronautical Service Office
AAW antiair warfare
AB Architect Building northern Virginia
ABA American Bar Association
ABAQUS finite-element computer code
ABB Asea Brown Boveri
ABC Aerobiochemical
ABC accelerator-based conversion
ABC advanced ball concept
ABE Army Background Experiment
ABES Alliance for Balanced Environmental Solutions
ABFEL air-based free-electron laser
ABHX air blast heat exchanger
ABILENE   A high-speed network for advanced Internet development within the university community. It is a project of the University Corporation for Advanced Internet Development (UCAID), a non-profit consortium of universities and corporate and affiliate members
Abilene   An advanced backbone network that supports the development and deployment of the new applications being developed within the Internet2 community
ABL airborne laser
ABL atmospheric boundary layer
ABLE activity balance line evaluation
ABLE Amazon Boundary Layer Experiment NASA
ABLE-2B Arctic/Atlantic/Atmospheric Boundary Layer Experiment
ABM antiballistic missile
ABRES advanced ballistic re-entry system
ABRV advanced ballistic re-entry vehicle
ABS automatic backup shutdown system
ABS-SC automatic backup shutdown of safety computer
absolute vorticity   The vorticity of a fluid particle determined with respect to an adsolute coordinate system.
ABTRES abatement & residual forecasting model
ABV auxiliary building ventilation
ABWA American Business Women's Association
ac alternating current
A/C Aircraft
AC Adirondac Conference
AC actual commitment
AC advisory circular/committee
AC alternating current
AC Ancho Canyon
AC area coordinator
A/C air conditioning
A&C abatement & control
ACA Atmospheric Chemistry of Aerosols
ACA American Conservation Association, Inc.
ACA applied combinatorial analysis
ACACIA A Consortium for the Application of Climate Impact Assessments
ACAP (ACAPs) Advanced computer for array processing
ACARS ARINC Communications and Relay System
ACARS ARINC Communication, Addressing, and Reporting System
ACAS Advisory Committee for Atmospheric Sciences
ACATS Airborne Chromatograph for Atmospheric Trace Species
ACB air-operated circuit breaker
ACBM asbestos-containing building material
ACC abnormal condition control
ACC Abrupt Climate Change
ACC Antarctic Circumpolar Current NASA
ACC accumulator injection
ACCD aircraft compatibility control drawing
ACCENT Atmospheric Chemistry of Combustion Emissions Near the Tropopause
AccessGrid ***
ACD Atmospheric Chemistry Division NCAR
ACD advanced conceptual design
ACDA Arms Control and Disarmament Agency
acdar acoustic radar
ACDF Advanced Chemical Diagnostics Facility
ACDWG Atmospheric Center of Data Working Group
ACE Alliance for Clean Energy
ACE American Council on Education
ACE Antarctic Current Experiment
ACE Aerosol Characteristics Experiment
ACE Accelerated Computing Environment
ACE-1 Aerosol Characterization Experiment 1995
ACE-Asia Asian Pacific Regional Aerosol Characterization Experiment
ACEC American Consulting Engineers Council
ACEP DOC Advisory Committee, Export Policy
ACF acid concentrator feed
ACF automatic control feature
ACFM actual cubic feet per minute
acfm alternating current frequency modulation
ACG Advanced Computing Group NOAA, FSL
ACGIH American Conference of Governmental Industrial Hygienists
ACH air changes per hour
ACHEM Atmospheric Chemistry Model
ACI Advanced Computing Initiative
ACI automatic closure and interlock
ACIS automated chemical inventory system
ACIS Academic Information Systems A division of IBM in the 1980s
ACL Advanced Computing Laboratory
ACL alternative concentration level/limit
ACL auxiliary cooling loop
ACM Association for Computing Machinery
ACM advanced conventional munitions
ACM advanced cruise missile
ACM asbestos-containing material
ACME Airborne Carbone in the Mountains Experiment  
ACN AWIPS communication network A data and communications network with satellite and land-based components, created by the NWS
ACNFS Advisory Committee on Nuclear Facility Safety DOE
ACO administrative consent order
ACO advance change order
ACO Atomic Coordinating Office
ACOS Advanced Coronal Observing System
ACO/UK ACO/United Kingdom
ACP Acoustic Doppler profilers
ACR Active Cavity Radiometer
ACR air conditioner, cooling only
ACRIM active cavity radiometer irradiance monitor NASA/UARS 1996
ACRIM II Active Cavity Radiometer Irradiance Monitor NASA/UARS
ACRS Advisory Committee, Reactor Safeguards
ACRT Aircraft report
ACS American Chemical Society
ACS Administrative Computing and Systems
ACS automated cartridge system
ACS account control system
ACS Aldus color file
ACS auxiliary cooling system
ACSE association control service element
ACSH American Council on Science & Health
ACSYS Arctic Climate System Study
ACT atmospheric chemical transformations
ACTS Atmospheric Chemistry of Transient Species NCAR, ACD
ACTS Advanced Communications Technology Satellite
ACV air-cushion vehicle
ACV at-completion variance
ACVC arms control verification committee
ACWA American Clean Water Association
ACWP actual cost of work performed
A/D analog-to-digital
ADA Americans with Disabilities Act
ADA applied decision analysis
ADAAC EOS program
ADAACS Affiliated Distributed Active Archive Centers NASA
ADARS Aircraft Data Acquisition and Recoding System NCAR
ADATS Automated Data Acquisition and Transfer System
ADB Apple desktop bus
ADC analog-to-digital converter
ADC affiliated data center
ADC authorized derivative classifier
ADCLS Advanced Data Collection and Location System
AD&D accidental death and dismemberment
ADDE Abstract Distributed Data Environment
ADDS Aviation Digital Data Service
ADEOS Advanced Earth Observing Satelite Japan
ADEPT Alexandria Digital Earth Prototype
ADF automatic direction finding
ADF Advanced Development Facility NOAA, FSL
ADI acceptable daily intake
ADI Alternating Direction Implicit
ADI air defense initiative
ADISS analytical data interchange and storage standards
ADL above detection limit
ADL Alexandria Digital Library
ADM action description memorandum
ADM arrow diagram method
ADM atomic demolition munition
ADM Administrative Services Section NCAR
ADMP Acid Deposition Modeling Project
ADO Associate Director for Operations
ADP administrative data processing
ADP Automatic data processing
ADP Anderson, DeBartolo and Pan architects
ADPE automatic data processing equipment or ADP equipment
ADR alternative dispute resolution
ADR audit discrepancy report
ADS activity data sheet
ADS Airborne Data System
ADS Aircraft Data Systems
ADS ancillary data service
ADSB Advanced Display Systems Branch NOAA, FSL
ADSCEPTS advanced self-contained chemical energy propulsion
ADT aerated drain tank
ADTF At Depth Test Facility
ADV atmospheric dump valve
ADVISAR All Digital Video Imaging System for Atmospheric Research
AE Atmospheric Explorer
AE architect/engineer
AEA Atomic Energy Authority
AEA Atomic Energy Act of 1954
AEB auxiliary equipment building
AEC Associate Enforcement Counsel EPA
AEC Atomic Energy Commision United States; ERDA, now DOE
AECA Arms Export Control Act
AED Atomic Emission Detector
AED Air Enforcement Division EPA, OECM
AEDS atomic energy detection system
AEE Alliance for Environmental Education
AEEN Agence Europeenne pour l'Energie Nucleaire
AEERL Air and Energy Engineering Research Laboratory EPA, ORD
AEGIS Atmosphere Ecosystem Gas Interchange Study
AEM application evaluation matrix
AEN administrative exception note
AEO Atomic Energy Organization Iran
AEOS analytic equation-of-state
AEP alkaline earth precipitate
AER advanced electric reactor
AER average evoked response
AER AWIPS Forecast Preparation System
AERE Atomic Energy Research Establishment Harwell England
AERE Association of Environmental & Resources Economists
AEROCE Air Ocean Exchange Experiment
aerosol   A colloidal system in which the dispersed phase is composed of either solid or liquid particles, and in which the dispersion medium is some gas, usually air.
AEROCE Atmosphere/Ocean Chemistry Experiment
AES Atmospheric Environment Service Canada
AES atomic emission spectroscopy
AES Auger electron spectroscopy
AESA Atmospheric Effects of Stratospheric Aircraft NASA
AESD Advanced Energy System Division Westinghouse
AEW airborne early warning
AF United States Air Force affiliate
AF auxiliary feed
AF audio frequency
AFA American Forestry Association
AFAP artillery-fired atomic projectile
AFASE Association for Applied Solar Energy
AFATL Air Force Armament and Testing Laboratory
AFB air force base
AFB atmospheric fluidized bed
AFC automatic flow control
AFCCN Air Force Chief Scientist
AFCRL Air Force Cambridge Research Laboratories
AFCSA/CC Commander, Air Force Center for Studies and Analysis
AFD axial flux difference
AFD acid fractionator distillate
AFEAS Alternate Fluorocarbon Environmental Acceptability Study
AFEL advanced free-electron laser
AFESC Air Force Engineering & Sciences Center
AF&F arming, fuzing, and firing component
AFGL Air Force Geophysics Laboratory
AFGWC Air Force Global Weather Central
AFI Atomic Industrial Forum, Inc.
AF/INX Air Force Assistant Chief of Staff, Director of Policy, Plans, & Programs
AFIS automated fingerprint identification system
AFM atomic force microscopy
AFNB US Air Force Scientific Advisory Board
AFNE American for Nuclear Energy
AFO available for obligations
AFOE advanced fiber optic echelle
AFOS Automation of Field Operations and Services NOAA, a NWS program during the 1980s and early 1990s
AFOSR Air Force Office of Scientific Research
AFP Apple File Protocol
AFP advanced flexible processor
AFP approved financial/funding plan
AFP approved funding program
AFPEO/ST Air Force Programs Executive Officer, Director of Strategic Programs
AFPRO Air Force Plan Representative Office
AFPS AWIPS Forecast Preparation System
AFR audit finding report
AFS auxiliary feedwater system
AFSAS Air Force Director for Strategic Force Analysis
AFSC Air Force Systems Command
AFSSO Air Force Special Security Office
AFT Antifreeze protein
AFTAC Air Force Technical applications Center
AFV alternative fuel vehicle
AFV armored fighting vehicle
AFW auxiliary feedwater
AFWA Air Force Weather Agency, 4/98
AFWL Air Force Weapons Laboratory
AG alternating gradient
AG Australia Group nonproliferation
AGA automatic gas analyzer
AGARD Advisory Group for Aeronautical Research and Development NATO
AGASP Arctic Gas and Aerosol Sampling Program
AGC Automatic gain control
AGCM atmospheric general circulation models
AGDATS Air-Ground Data Telemetry System
AGFA advanced gust front algorithm
AGFS Aviation Gridded Forecast Systems
AGGG Advisory Group on Greenhouse Gases
AGI American Geological Institute Washington, D.C.
AGL above ground level
AGM Atmospheric Gas Measurements Section
AGO Automatic Geophysical Observatory
AGR advanced gas-cooled reactor
AGRICLIMSS Agicultural Climate Service System ISWS
AGS alternating-gradient synchrotron
AGS annulus gas system
AGT above-ground test
AGT advanced ground transport
AGU American Geophysical Union
A/H air handling
AHERA Asbestos Hazard Emergency Response Act
AHF Advanced Hadron Facility
AHP analytical hierarchy process
AHS automated highway system
AHW Advanced Hurricane-research WRF (formerly Advanced Hurricane WRF)
AI Artificial Intelligence
AI action item
AI authorized inspector
A/I accident/incident
AIAA American Institute of Aeronautics and Astronauts
AIAIT Army Intelligence and Threat Analysis Center
AIAS automatic incident actuation system
AIC acceptable intake for chronic exposure
AICC adiabatic isochoric complete combustion
AICE American Institute of Chemical Engineers
AICHE American Institute of Chemical Engineers
AID Agency for International Development USA
AID air inlet damper
AIDA Arecibo Initiative with Dynamics of the Atmosphere
AIDA Archive 1 Data Analyzer
AIDJEX Arctic Ice Dynamics Joint Experiment
AIDS Activity Information Data Systems
AIDS autoimmune deficiency syndrome
AIF Atomic Industrial Health Forum, Inc.
AIM adaptive injection molding
AIM advanced industrial materials
AIM artificial ionization mirror
AIMR airborne imaging microwave radiometer
AIMS advanced information management systems
AI&O annual inspection and overhaul
AIP American Institute of Physics
AIP additions in progress
AIP agreement in principle
AIRAPT International Association for Research on High Pressure Science & Technology
AIRES Artificial Intelligence Research in Environmental Science
AIRFA American Indian Religious Freedom Act
AIRMET AIRmen METeorological information
air pressure   see atmospheric pressure
AIRS Advanced Infared Studies Program with GAARS
AIRS Atmospheric Infrared Sounder
AIRS advanced inertial reference sphere
AIS Airborne Imaging Spectrometer
AIS acceptable intake for subchronic exposure
AIS accumulator injection system
AIS administrative information systems
AIS affiliate information system
AIS advanced isotope separation AVLIS
AIS Affiliate and Immigration Services
AISC Assessment and Information Services Center
AISC Industry, Science, & Technology Canada
AISEC Army Information Engineering Command
AIST Agency of Industrial Science & Technology Japan
AIT audit inventory team
AIV aviation-impact variable
AIX Advanced Interactive Executive An IBM version of the UNIX operating system
AKP Atmospheric Kinetics Project
AL Aeronomy Laboratory NOAA
AL Ames Laboratory
AL analytical laboratory
AL authorized leave with pay
AL Albuquerque Field Office
ALADIN atmospheric laser Doppler instrument ESA
ALA-O delta-aminolevulinic acid dehydrates
ALAP as low as possible
ALAP as low as practical
ALAPCO Association of Local Air Pollution Control Officials
AL/APD ALO Advance Planning Division
ALARA as low as reasonably achievable
ALBM air-launched ballistic missile
ALBURT Albuquerque budget reform task
ALC airlift circulator
ALC allocations
ALCLAD clad aluminum alloy
ALCM air-launched cruise missile
ALDEN Alden Electronics A company that provides meteorological services
ALDF Animal Legal Defense Fund
ALE Atmospheric Lifetimes Experiment
ALE arbitrary Lagrangian-Eulerian code
ALEC American Legislative Exchange Council
ALE/GAGE Atmospheric Lifetime Experiment/Global Atmospheric Gases Experiment
AL/EPD AL Environmental Protection Division
ALERT Automated Local Evaluation in Real Time
Alert   a Canadian military base 500 miles from North Pole
ALEXIS array of low-energy x-ray imaging sensors
AL/FPMD AL Facilities Planning & Maintenance Division
AL/HPD AL Health Protection Division
ALJ Administrative Law Judge
ALI Alpha/LAMP Integration
ALI annual limit on intake
AL/KAO AL Kirtland Area Office
AL/MRD AL Management Review Division
ALMS atomic line molecular spectroscopy
ALOO Albuquerque Operations Office
AL/OESH AL Office of Environment, Safety, and Health
ALOHA Airborne Lidar Observations and Hawaiian Airglow
AL/OIEA AL Office of Intergovernmental and External Affairs
AL/OQD AL Operation Safety Division
ALP assemble language preprocessor
ALPA Airline Pilots Association
ALPAL parallel program developed at LLNL
ALPEX Alpine Experiment
AL/PIRD AL Personnel, Industrial Relations Division
ALPR Argonne Low Power Reactor
ALPS accidental launch protection system
ALPS alternate launch point system
ALPTRAC Part of EUROTRAC
ALS advanced launch system
ALS advanced light source
ALSAS AT Line Solution Assay
ALSI aluminum silicon alloy
AL/SPD AL Special Programs Division
ALT Altimeter
ALT/RA Altimeter/Radar Altimeter
ALU arithmetic logic unit
ALWAS Advanced Low-Level Wind Shear Alert System
AL-WDD Albuquerque Operations, Weapons Development Division
AL/WMOSD AL Waste Management & Operational Surety Division
AM Ampex, Inc.
AM Audio modulation
AM Amplitude modulation
AMAD activity-median aerodynamic diameter
AMAX American Metals Climax potash mine
AMBIENS atmospheric mass balance of industrially emitted & natural sulfur
AMC American Mining congress
AMC Army Materiel Command
AMC appraisal management center
AMD alpha activity median diameter
AMESS autonomous machine environmental surveillance system
AMEX Australian Monsoon EXperiment
AMFS advanced manufacturing feasibility studies
AMI Active Microwave Instrument
AMI-2 Active Microwave Instrument 2
AMIE Assimilative Mapping of the Ionospheric Electrodynamics
AMIP Atmospheric Model Intercomparison Project
AMIR Advanced Microwave Imaging Radiometer
AML acronym master list
AML Advanced Materials Laboratory Albuquerque
AMMORA Adaptation of Meso-beta-scale Models for Operational and Research Applications
AMMS Advanced Microwave Moisture Sounder
AMO Advanced Munitions Office
AMOL Atlantic Marine Oceanographic Laboratory
AMOS Automatic Meteorological Observation System NWS
AMOS Automatic Meteorological Observation System NWS
AMP advanced machining program
AMP Ampere
AMP asynchronous multiprocessing
AMPE automated message processing exchange
AMPS Antarctica Mesoscale Prediction System
AMPS Atmospheric, Magnetospheric, and Plasma Studies NASA
AMR Advanced Microwave Radiometer
AMR adaptive mesh refinement
AMRIR Advanced Medium Resolution Imaging Radiometer
AMRR Army Material Research Reactor
AMRV advanced maneuvering re-entry vehicle
AMS American Meteorological Society
AMS American Mathematical Society
AMS Accelerator Mass Spectrometer
AMS automated meteorological station
AMS aerial monitoring/measurement system
AMS aerial measurement station
AMS analysis mass spectrometer
AMS applied mathematical science
AMS appraisal management system
AMS Army Map Service
AMS atomic mass spectrometry
AMSG appropriate military systems guide
AMSOC American Miscellaneous Society
AMSR Advanced Microwave Sounding Radiometer
AMSR Advanced Microwave Scanning Radiometer
AMSU advanced microwave sounding unit NASA
AMTEL Advanced Materials Testing & Evaluation Laboratory
AMTEX Air Mass Transformation Experiment Japan/GARP, 1975
AMTL Army Material Test Laboratory
AMTS Arctic Mesopause Temperture Study
AMTS Advanced Moisture and Temperature Sounder
AMU aqueous makeup
amu atomic mass unit
AMVP Aviation Model Verification Program
AMWG Atmosphere Model Working Group
ANACONDA intense electron beam accelerator
ANARChE (The Atlanta) Aerosol Nucleation and Real-time Characterization Experiment  
ANATEX Across North America Tracer Experiment NOAA
ANDAS Advanced Neutron Detection Analysis System
ANEC American Nuclear Energy Council
AN/FPQ-6 AN/GSN, AN/FPQ-16, AN/MPS-19, AN/ASR-7 Abbreviations never spelled out
ANG Air National Guard
ANI authorized nuclear inspector
ANL Argonne National Laboratory
ANL-E Argonne National Laboratory-East
ANL-W Argonne National Laboratory-West
ANM alternate nuclear materials, secondary
anonymous FTP   See FTP
ANPR advance notice of proposed rulemaking
ANRHRD Air, Noise, & Radiation Health Research Division EPA, ORD
ANS advanced neutron source
ANS American National Standard
ANS American Nuclear Society
ANS autonomic nervous system
ANSI American National Standards Institute An independent organization whose purpose is establishing voluntary computing industry standards
ANSS American Nature Study Society
ANSTO Australian Nuclear Science and Technology Organization
ANTA 5-amino-3-nitro-1H-1,2,4-triazole
ANTARES Advanced Nuclear Thermal Rocket Engine Simulator
ANTHEM plasma simulation code
AO Arctic Oscillation
AO announcement of oppurtunity
AO abnormal occurrence
AO administrative order
AO air overseas
AO annotated outline
AOC area of concern
AOC award of contract
AOC area of contamination
AOD argon-oxygen decarbonization
AOG acid offgas
AOG augmented offgas
AOIPS Atmospheric and Oceanographic Information Processing System NOAA
AOL Airborne Oceanographic LIDAR
AOM annual operating & maintenance cost
AOML Atlantic Ocean Meteorological Laboratory NOAA
AON Atmospheric Odd Nitrogen Species Project NCAR
AOO anticipated operational occurrence
AOP abnormal operating procedure
AOP annual operating plan
AOPR associated offices of primary responsibility
AORD Astronaut Operations Requirements Document
AOS Advanced Orbiting System
AOS Archive and Operations System
AOSO Advance orbiting solar observatory
AOSP advanced onboard signal processor
AOS/VS advanced operating system/virtual storage
AOV air-operated valve
AP Anomalous Propagation
AP attached payload
AP access permit
AP action plan
AP administrative procedure
AP Amparo
AP assigned personnel
APA Allied Pilot's Association
APA Administrative Procedures Act
APA American Planning Association
APACM Atmospheric Physical and Chemical Monitor EOS
APARE Asian/Pacific Regional Experiment
APAS Astrophysical, Planetary, and Atmospheric Sciences
APC argon purge cart
APC ammonium perchlorate
APCA Air Pollution Control Association
APD Advanced Planning Division DOE
APD advance planning document
APD areal power density
APD avalanche photodiode
APDCS axial power distribution monitoring system
APDF accelerator performance demonstration facility
APE action plan element
APEN air pollution emissions notice
APET accident progression event tree
APEX Acid Precipitation Experiment
APEX advance purchase excursion
APEX APLE Prototype Experiment
APG Aberdeen Proving Ground
APHA American Public Health Association
API American Petroleum Institute
API application program interface
API axial power indicator
API absolute position indication
APIP Aircraft Produced Ice Particles
ApJ The Astrophysical Journal
APL Applied Physics Laboratory
APL average power laser
APLE average power laser experiment
APLJHU Applied Physics Laboratory John Hopkins University
APM axial power monitor
APO Administrative Policy Office
APOL Analytical Photonics and Opto-Electronics Laboratory
APOLLO2 RTD SRL code for operating limits
APPA American Public Power Association
Apple Apple Computer Inc.
AppleTalk   A local area network system manufactured by Apple
Application an end-user computer program designed to perform specific tasks e.g., graphical display application, word-processing application, payroll application, etc.
APPLY parallel program generation CMU
APR automatic pressure relief
APR Aberdeen Pulsed Reactor Facility
APRM average power range monitor
APS American Physical Society
APS Advanced Power Source
APS array processing system
APS atomic power station
APS auxiliary power system
APS autocorrelated photon spectroscopy
APS axial power shape
APT automatic picture transmission
APT Alliance for Photonic Technology
APT accelerator production of tritium
APU auxiliary power unit
AQCA Air Quality Control Act
AQCR Air Quality Control Region California
AQCR Air Quality Control Regulation New Mexico
AQD Atmospheric Quality Division New name for AQM, July 1977
AQD Air Quality Digest
AQM Atmospheric Quality and Modification new science division at NCAR, April 1973
AQMA air quality maintenance area
AQSM air quality simulation model
AR administrative requirement
A&R air and radiation
ARA Appletalk Remote Access
ARAC atmospheric release advisory capability
ARAR applicable or relevant and appropriate
ARBI adjusted running book inventory
ARC Ames Research Center NASA
ARC Antarctic Research Center Scripps
ARC Applied Research Corporation
ARC accelerating rate calorimetry
ARCAS all-purpose Rocket for the Collection of Atmospheric Soundings
ARCC American Rivers Conservation Council
Archie Internet archive listing service A system to automatically gather, index, and serve information on the Internet
ARCnet Attached Resource Computer Network
ARCSS Arctic Systems Science NSF
ARCsym Arctic Regional Climate simulation
ARD Air & Radiation Division EPA, OGC
ARDEC Army Armament Research and Development Engineering Center
AREA File format used for graphic images by the McIDAS application
AREAL Atmospheric Research and Exposure Assessment Lab EPA
ARES advanced reentry system
ARF Aviation Route Forecast
ARG Appointments Review Group
ARG American Resources Group
ARG Accident Response Group
ARGOS data collection and location system France
ARGOS French satellite-borne data relay and platform location system Global Weather Experiment in 1979, NOAA
ARGUS ARGonne Unified Safeguards
ARI alternate rod insertion
ARIES automated retirement and integrated extraction system
ARIMP Atmospheric Radiation Investigation and Measurements Project NCAR, ACD
ARIN Aerospace Resource Information Network
ARINC Aeronautical Radio, Inc.
ARIS Airborne Research Instrumentation System
ARISTOTELES Applications and Research Involving Space Technologies Observing the Earth's Field from Low Earth Orbiting Satellite
ARL Air Resources Laboratory NOAA
ARL Army Research Laboratory
ARM Atmospheric Radiation Measurement program DOE
ARMAR Airborne Rain Mapping Radar NASA/JPL
ARM-CART Atmospheric Radiation Measurement-Clouds and Radiation Testband
ARO Army Research Office
ARPA Advanced Research Projects Agency DOD
ARPA Archaeological Resources Protection Act 1979
ARPANET Advanced Research Projects Agency Network U.S. Department of Defense, created in the late 1960s and replaced in the mid-1980s by NSFNET
ARPS Advanced Regional Prediction System
ARR Association for Radiation Research UK
ARRL Amateur Radio Relay League
ARS American Rocket Society
ARSR Air Route Surveillance Radar
ART Aqueous Recycle Technologies
ARTCC Air Route Traffic Control Center
ARW Advanced Research Workshop
ARWG Atmospheric Radiation Working Group NCAR
ASALM Advanced Strategic Air Launched Missile
ASAP Automated Shipboard Aerological Program GAMP
ASAP as soon as possible
ASAP Ariane structure for auxiliary payloads
ASAP Aerospace Safety Automation Program
ASAP Aerospace Safety Advisory Panel
ASAP Accelerated Situational Awareness Prototype
ASAS Advanced Solid-State Array Sensor
ASASP Active Scattering Aerosol Spectrometer
ASASP Advanced Solid-State Array Sensor
ASC Advanced Science Computer Texas Instruments
ASC ASTER Steering Committee
A scale Planetary scale 2,000 to 10,000 km
ASCE American Society of Civil Engineers
ASCENT Atmospheric Sounding, Central Evaluation, and Test Support U.S. Air Force
Ascent Control Data 6600 assembly language
ASCII American Standard Code for Information Interchange A standard code for electronically exchanging character-based (nonbinary) information
ASCOT Atmospheric Studies in Complex Terrain
ASD Aircraft Situation Display
ASDAR Aircraft-to-Satellite Data Relay
ASE Air Sea Experiment EUROTRAC
ASE Amplified Spontaneous Emission
AS&E American Science and Engineering, Inc. Cambridge, Massachusetts
ASEP Accident Sequence Evaluation Program
ASER Annual Site Environmental Report
ASF Alaska SAR Facility
Ash Can Project Ash Can ERDA, NASA
ASHAA Asbestos in Schools Hazard Abatement Act
ASHOE Airborne Southern Hemisphere Ozone Experiment NASA, NOAA, NSF, NASU, October 1994
ASHRAE American Society of Heating, Refrigeration, and Air-Conditioning Engineers
ASI Advanced Simulation Initiative
ASI Agenzia Spaxiale Italiano
ASIC Application Specific Integrated Circuit
ASIS American Society for Industrial Security
ASIWPCA Association of State & Interstate Water Pollution Control Administrators
ASL Atmospheric Science Laboratory U.S. Army
ASL above sea level
ASL American Sign Language
ASLB Atomic Safety Licensing Board
ASM American Society for Metals
ASME American Society of Mechanical Engineers
ASNT American Society for Nondestructive Testing
ASOS Automated Surface Observing System NWS, NOAA/FAA, February 1989
ASP Astronomical Society of the Pacific
ASP Advanced Study Program NCAR
ASP Advanced Stokes polarimeter NCAR, HAO
ASP alarms and shutdown process
ASPA American Society of Public Administration
ASPEA Association Suisse pour l'Energie Atomique
ASPR Armed Services Procurement Regulation
ASQC American Society for Quality Control
ASR Airport Surveillance Radar
ASR Annual Scientific Report
ASRC Atmospheric Sciences Research Center State University of New York at Albany
ASRF Advanced Size Reduction Facility
ASRL Atmospheric Science Research Laboratory
ASROC antisubmarine rocket
ASSET Aerothermodynamicelastic Structure Systems Environmental Tests U.S. Air Force
ASSIST ADPE system sizing tool
AST algorithm support team
AST AVCO Systems Textron
ASTER Atmosphere-Surface Turbulent Exchange Research Facility
ASTER advanced spaceborne thermal emission and reflection radiometer EOS, Japan,1996
ASTERIX French acronym for ELDORA
ASTEX Atlantic Stratocumulus Transition Experiment FIRE, 1992
ASTEX/MAGE Atlantic Stratocumulus Transition Experiment/Marine Aerosol and Gas Exchange
ASTHO Association of State & Territorial Health Officials
ASTIA Armed Services Technical Information Agency See DDC
ASTM American Society for Testing Materials See also NDT
ASTSWMO Association of State & Territorial Solid Waste Management Officials
ASW antisubmarine warfare
AT IBM Advanced Technology personal computer known simply as an AT or an IBM PC AT
AT abnormal transient
AT Accelerator Technology
AT Antarctic Treaty
ATA Air Transport Association
ATAC Advanced Technology Advisory Committee The committee that advises Unidata on technical issues
ATACMS Army Tactical Missile System
ATAMC Air Transport Association Meteorological Committee
ATC Air Traffic Control
ATC Adiabatic Toroidal Compressor
ATCSC Air Traffic Control Systems Command Center
ATD Atmospheric Technology Division NCAR
ATDRSS Advanced TDRSS
ATEN Association Technique de l'Energie Nucleaire France
ATEX Atlantic Tropical Experiment
ATEX Atlantic Tradewind Experiment
ATHENA Advanced Thermal-Hydraulic Energy Network Analyzer
Atlanta-ANARChE Atlanta Aerosol Nucleation and Real-time Characterization Experiment
ATIS Airport Terminal Information System
ATLAS Atmospheric Laboratory for Applications and Science
ATLAS Airborne Tunable Laser Absorption Spectrometer NASA
ATLAS Advanced Testing Line for Actinide Separations
ATLID Atmospheric LIDAR
ATM Apollo Telescope Mount
ATM Division of Atmospheric Sciences
ATM Adobe Type Manager
ATM Asynchronous Transfer Mode
ATMOS Atmospheric Trace Molecules Observed by Spectroscopy
atmospheric pressure   The pressure exerted by the atmosphere as a consequence of gravitational attraction exerted upon the "column" of air lying directly above the point in question.
ATMS Advanced Traffic Management System
ATOG Abnormal Test Procedure Operator Guidelines
ATR attenuated total reflection
ATR Alliance for Transportation Research
ATRAD detailed atmospheric radiation model W.J. Wescombe's
ATRAP Alliance for Transportation Research
ATRMD Air, Toxics, & Radiation Monitoring Research Division EPA, ORD
ATS Advanced Technology Satellite
ATS Application Technology Satellite GARP
ATS Accelerator Test Stand
ATSD Assistant to the Secretary of Defense
ATSDR Agency for Toxic Substances and Disease Registry Centers for Disease Control
ATSR Argonne Thermal Source Reactor
ATSR along track scanning radiometer
ATST Advanced Technology Solar Telescope
ATSU Accelerator Test Stand Upgrade
ATV Ariane transfer vehicle
AU astronomical unit
AURA Association of Universities for Research in Astronomy
AUSPEX Atmospheric Utility Signatures-Predictions and Experiments
AVARs Aircraft Vertical Accelerometer Reports
AVC advanced vector computer
AVC automatic volume control
AVCS advanced vidicon camera service NASA
AVE Atmospheric Variability Experiment SSAPP
AVHRR Advanced Very High Resolution Radiometer A satellite-borne instrument
AVIRIS Airborne Visible and Infared Imaging Spectrometer
AVMA Automotive Vehicle Manufacturers Association
AVN Aviation model at NCEP
AVS Application Visualization System
AVS Express upgraded version of the Application Visualization System
AW Annual Worth
AWACS Airborne Warning and Control System
AWC Aviation Weather Center NWS
AWC Association of Women in Computing
AWDAAS Automatic Weather Data Acquisition and Archiving System
AWDL Aviation Weather Development Laboratory
AWDP Aviation Weather Development Program
AWDS Automated Weather Distribution System
AWE Atomic Weapons Establishment United Kingdom
AWEA American Wind Energy Association
AWES American Wind Energy Systems
AWF Aging Waste Facility
AWFTF Aviation Weather Forecasting Task Force
AWG American wire gage
AWGWC Air Force Global Weather Center
AWIPS Advanced Weather Interactive Processing System An NWS program initiated in the 1990s; also known as the "modernization program"
AWIPS-90 Advanced Weather Interactive Processing System for the 90's
AWISE Association of Women in Science and Engineering
AWN Aviation Weather Network
AWOS Automated Weather Observing System
AWP Aviation Weather Program
AWPG Aviation Weather Products Generator
AWQC Ambient Water Quality Criteria
AWRDF Advanced Weapons Radiochemical Diagnostics Facility
AWRE Atomic Weapon Research Establishment
AWS Aviation Weather Service U.S. Air Force
AWS Air Weather Service now the Air Force Weather Agency, 4/98
AWSE Australian Winter Storm Experiment
AWSMSC Air Weather Service Master Station Catalog
AWU Associated Western Universities Salt Lake City, Utah
AWU atomic weight unit amu
AWWA American Waterworks Association
AX auxiliary systems
AXAF Advanced X-ray Astrophysics Facility
AXBT Air-Deployed Expendable Bathythermographs
AXBT Expendable Bathythermographs Air dropped temperature device
AXCP Airborne Expendable Current Profiler
AY Sandia National Laboratory