Browse Acronyms
Browse the acronym list:
A Listing
Å
angstrom [convert to SI: meter (m)]
a
amorphous
A
– ampere
– mass number [mass number = atomic number + neutron number (A = Z + N)]
A&E
architect and engineer
A-E
architect-engineer (see A/E)
A-h
ampere-hour
A-O
acoustic-optic
a-Si
amorphous silicon
A-T
ampere-turns
A.B.
Bachelor of Arts (also B.A.)
a.m.
ante meridiem (before noon)
A.M.
Master of Arts (also M.A.)
A/C
– air conditioner/conditioning (also AC)
– aircraft
A/D
analog-to-digital
A/D/O
analog/digital/optical
A/E
architect/engineer (see A-E)
A/M
amperes per meter
A/WOMS
Account/Work Order Master
A2LA
American Association for Laboratory Accreditation
A2R2
Argonne Advanced Research Reactor
A5N-DP
Alpha 5 North Dye Penetrant
aa
arrested crack length
aA
abampere [convert to SI: ampere (A)]
AA
– affirmative action
– Aluminum Association
– Amarillo Area Office (DOE)
– atomic absorption
– atomic absorption spectroscopy
– authorization agreement
AA/EEO
Affirmative Action/Equal Employment Opportunity
AAA
American Automobile Association
AAAS
American Association for the Advancement of Science
AABB
American Association of Blood Banks
AAC
– Administrative Advisory Council (ORNL)
– Alaskan Air Command
AACC
American Association for Clinical Chemistry
AACE
– American Association of Cost Engineers
– Athens Automation and Control Experiment
AACETS
Athens Automation and Control Experiment Test System
AACG
American Association for Crystal Growth
AACI
Association of American Cancer Institutes
AACR
American Association for Cancer Research
AACTSO
Afro-Academic, Cultural, Technological and Scientific Olympics (NAACP)
AAF
antialiasing filter
AAFES
Army and Air Force Exchange Service
AAG
Association of American Geographers
AAHP
– air-to-air heat pump
– American Academy of Health Physics
AAIs
abbreviations, acronyms, and initialisms
AALAS
American Association of Laboratory Animal Science
AAMRL
Armstrong Aerospace Medical Research Laboratory
AAO
Albuquerque Acquisition Office
AAOM
American Academy of Occupational Medicine
AAP
– Affirmative Action Program
– Association of American Publishers
AAPA
American Academy of Physician's Assistants
AAPP
Academic Assessment Placement Program
AAQS
Ambient Air Quality Standards
AAS
– Adopt-A-School (program)
– atomic absorption spectrometry/spectrometer/spectroscopy
AAT
Advanced Apprentice Training
AATB
American Association of Tissue Banks
AAU
accelerated aging unit
AAV
Assault Amphibious Vehicle
ABA
– American Bar Association
– Architectural Barriers Act of 1968
ABB Atom
Asea Brown Boveri Atom
ABB/CE
Asea Brown Boveri/Combustion Engineering
ABC
aluminum beverage can
ABD
Authorization Basis Document
ABET
Accrediting Board for Technology
ABFTM
Application-By-Forms
ABHP
American Board of Health Physics
ABIH
American Board of Industrial Hygienists
ABL
atmospheric boundary layer
ABM
antiballistic missile
ABMA
American Boiler Manufacturers Association
ABMDATC
Army Ballistic Missile Defense Advanced Technology Center
ABO3
perovskite
ABR
advanced breeder reactor
ABRV
advanced ballistic reentry vehicle
abs
absolute
ABS
– acrylonitrile butadiene-styrene
– Animal Behavior Society
ABW
Air Base Wing
ABWA
American Business Women's Association
ABWR
advanced boiling water reactor
ac
alternating current
Ac
actinium (element, Z = 89)
AC
– acceptance criteria
– air conditioner/conditioning (also A/C)
– annual cost
– auxiliary control
AC&W
Aircraft Control and Warning (USAF)
ACA
American Compensation Association
ACAL
administrative control action level
ACAMS
automatic continuous air monitoring system
ACARS
Access Control and Release System
ACC
aquifer contamination control
ACCA
– Air Conditioning Contractors of America
– American Cave Conservation Association
ACCOD
Anderson County Center for Occupational Development
ACCR
Aquifer Contamination Control Report
ACD
– advanced conceptual design
– Analytical Chemistry Division (ORNL)
ACDA
Arms Control and Disarmament Agency
AcDm
Activities Description Memorandum
ACE
– annual cooling energy
– Association of Cost Engineers
ACEC
American Consulting Engineers Council
ACEEE
American Council for an Energy-Efficient Economy
ACES
– Administrative Computing Environment Strategy
– Annual Cycle Energy System
acfm
actual cubic feet per minute [convert to SI: cubic meters per second (m3/s), which is preferred over liters per second (L/s); see restrictions listed under "L" for "liter"]
ACGIH
American Conference of Governmental Industrial Hygienists
ACH
air changes per hour
ACHP
Advisory Council on Historic Preservation
ACHRE
Advisory Committee on Human Radiation Experiments
ACI
– acceptable chronicintake
– American Concrete Institute
ACID
Acidification Chemistry Information Data Base (BNL)
ACL
– administrative control limit
– Advanced Computing Laboratory (LANL)
– alternate concentration level/limit
– annual cooling load
ACM
– air combat maneuver
– alternate crisis manager
– asbestos-containing material
– Associated Colleges of the Mideast
– Association for Computing Machinery
– automated command media
– avoidable cost manager (ORNL)
ACMV
Advanced Computation and Machine Vision (group of I&C Division)
ACMW
Associated Colleges of the Midwest
ACN
– acetonitrile
– activity change notice
– advance change notice
ACNFS
Advisory Committee on Nuclear Facility Safety/Ahearne Committee
ACO
– Administrative Consent Order
– advance change order
ACP
– Advanced Controls Program (ORNL)
– American College of Physicians
– ancillary control process
– arithmetic control processor
ACPERS
Army Civilian Personnel System
ACR
– Anomalous Condition Report
– area control room
ACRD
– Atmospheric and Climate Research Division
– automatic control rod drive
ACRDS
automatic control rod drive system
acre
[do not abbreviate this word; convert to SI: square meter (m2)]
acre-ft
acre-foot [convert to SI: cubic meter (m3)]
ACREM
accountable classified removable electronic media
ACRF
advanced controls research facility
ACRS
– Advisory Committee on Reactor Safeguards
– Approved Comprehensive Records Schedule
ACS
– Administrative Control for Safety
– advanced control system
– American Ceramic Society
– American Chemical Society
– American College of Surveyors
ACSA
Association of the Collegiate School of Architecture
ACSC
Administrative Computing Steering Committee (ORNL)
ACSL
Advanced Continuous Simulation Language
ACSM
American Congress of Surveying and Mapping
ACSR
aluminum cable steel reinforced
ACT
Air Combat Tactics
ACTO
– Advanced Controls Technology Operation (ORNL)
– Advanced Controls Test Operation (ORNL)
ACTP
Advanced Control Technology Program (ORNL)
ACU
– air conditioning unit
– Assault Craft Unit
ACUC
Animal Care and Use Committee (ORNL)
ACWP
actual cost of work performed
ACWR
aircraft wash rack
ACWS
Anderson County Wildlife Sanctuary
ad
adjoint (math)
AD
– Anno Domini
– associate director
ADA
– adenosine deaminase
– American Dietetic Association
– Americans with Disabilities Act of 1990
– average daily attendance
ADANS
– Airlift Deployment Analysis System (USAF)
– AMC Deployment Analysis System
ADAPT
Advanced Design and Production Technologies
ADC
– administrative dose control
– Aerospace Defense Command
– analog-to-digital converter
– Association of Diving Contractors
– authorized derivative classifier (obsolete, see DC)
ADCIS
Association for Development of Computer Based Instructional Systems
ADCOH
Appalachian Ultradeep Core Hole
ADDNET
Acid Deposition Data Network (EPA)
ADEA
Age Discrimination in Employment Act
ADEC
Advanced Diagnostics Engineering Center (ORNL)
ADERDC
Advanced Diagnostic Engineering Research and Development Center (ORNL)
ADF
U.S. Army Demonstration Facility (see EPDF)
ADI
– acceptable daily intake
– Air Defense Initiative
– AudioDigital Imaging, Inc.
ADIF
all-dielectric interference filter
ADINAT
Automatic Dynamic Incremental Nonlinear Analysesof Temperatures
ADL
Automated Data Library
ADM
Action Description Memorandum
ADP
– Advanced Development Program
– Advanced Diverter Program
– ammonium dihydrogen phosphate
– automated data processing
ADPA
American Defense Preparedness Association
ADPE
automatic data processing equipment
ADR
alternate dispute resolution
ADRP
Audit-Directed Retrofit Program
ADS
– activity data sheet
– Air Defense Squadron
– automatic depressurization system
– autonomous docking system
AdServ
Administrative Services
ADT
average daily traffic
ADU
ammonium diuranate
ADVAB
advanced absorber control rod
AE
– acoustic emission
– alternative evaluation
AEA
– American Economic Association
– American Evaluation Association
– Atomic Energy Act of 1954
– Atomic Energy Authority (U.K.)
AEC
– air emissions control
– U.S. Atomic Energy Commission (now DOE)
AECB
Atomic Energy Control Board (Canada)
AECL
Atomic Energy of Canada Ltd.
AECM
Atomic Energy Commission Manual (replaced by Department of Energy Manual)
AECPR
AEC procurement regulation
AED
aerodynamic-equivalent diameter
AEDC
Arnold Engineering Development Center
AEDE
annual effective dose equivalent
AEE
adverse environmental effect
AEH
analog electrohydraulic
AEHA
Army Environmental Hygiene Agency
AEIC
Association of Edison Illuminating Companies
AEL
– Appalachian Educational Laboratory
– Aquatic Ecology Laboratory (ESD)
AEM
analytical electron microscopy
AEO
Atomic Energy Outlook 1990
AEOC
Alternative Emergency Operations Center
AEOD
Office for Analysis and Evaluation of Operational Data (NRC)
AEP
American Electric Power Energy Services, Inc.
AEP-UEA
Alabama Enrichment Plant, Uranium Enrichment Associates
AEPG
– Auxiliary Emergency Portable Generator (HFIR)
– auxiliary emergency power generator
AEPIC
Architectural Engineering Performance Information Center
AER
– Advance Engineering Release
– annual environmental report
– auxiliary equipment room
AERC
Association of Ecosystem Research Centers
AERE
Atomic Energy Research Establishment (U.K.)
AERO
Association for Excellence in Reactor Operations
AES
– annual energy savings
– atomic emission spectroscopy
– Auger electron spectroscopy
AESF
annual energy savings factor
AESG
Analytical Environmental Support Group (K-25)
AET
actual evapotranspiration
AETF
Advanced Equipment Test Facility
AF
– adjustment factor
– Award Fee
af
audio frequency
AFAA
Air Force Audit Agency
AFAL
Air Force Armament Laboratory
AFAP
artillery-fired atomic projectile
AFAS
Advanced Field Artillery System (U.S. Army)
AFB
Air Force Base
AFBC
atmospheric fluidized-bed combustion
AFBMA
Anti-Friction Bearing Manufacturers Association
AFC
– alkaline fuel cell
– automatic frequency control
AFCC
U.S. Air Force Communications Command
AFCEE
Air Force Center for Environmental Excellence
AFCOMS
Air Force Commissary
AFCS
Air Force Communication Service
AFDC
allowance for funds during construction
AFDCS
Active Facilities Data Collection System
AFDM
– ash-free dry mass
– Auxiliary Floating Drydock Medium
AFDP
Award Fee Determination Plan
AFEAS
Alternative Fluorocarbons Environmental Acceptability Study (industrial consortium of CFC producers)
AFENAC
Air Force Environmental Noise Assessment Center
AFESA
Army Facilities Engineering Support Agency
AFESC
U.S. Air Force Engineering and Service Center
AFETR
Air Force Eastern Test Range
AFFF
aqueous-film-forming foam
AFFTC
Air Force Flight Test Center
AFGL
Air Force Geophysical Laboratory
AFIRM
Air Force Installation Restoration Management Committee
AFL-CIO
American Federation of Labor and Congress of Industrial Organizations
AFLC
U.S. Air Force Logistics Command
AFM
Air Force Manual
AFM
atomic force microscopy
AFML
Air Force Materials Laboratory
AFMTC
Air Force Missile Test Center
AFNEC
Air Force Nuclear Engineering Center (Wright-Patterson Air Force Base)
AFO
Alcohol Fuels Office (DOE)
AFOSH
Air Force Office of Safety and Health
AFOSI
Air Force Office of Special Investigations
AFP
– Alternative Feedstock Program
– Approved Funding Program
AFR
– Air Force Regulation
– away from reactor
AFRCE
Air Force Regional Civil Engineer
AFRES
U.S. Air Force Reserve
AFRP
Advanced Fuel Recycle Program
AFRRI
Armed Forces Radiobiological Research Institute
AFS
– Air Force Station
– American Fisheries Society
AFSC
– Air Force Systems Command
– Armed Forces Staff College
AFT
aggressive failure test
AFTAC
Air Force Technical Applications Center
AFTOX
U.S. Air Force Toxic Chemical Dispersion Model
AFUDC
allowance for funds used during construction
AFUP
Alternative Fuels Utilization Program (DOE)
AFV
alternative fuel vehicle
AFW
auxiliary feedwater
AFWAL
Air Force Wright Aeronautical Laboratories
AFWIS
Air Force World Wide Military Command and Control System Information System
AFWL
Air Force Weapons Laboratory
AFWS
auxiliary feedwater system
Ag
silver (element, Z = 47)
AG
adjutant general
AGA
– acoustic gas analyzer
– American Gas Association
AGC
– advanced gas centrifuge
– automatic gain control
AGCA
Associated General Contractors of America
AGCR
advanced gas-cooled reactor
AGE
aerospace ground equipment
AGHE
absorber-generator heat exchanger
AGI
– adjusted gross income
– American Geological Institute
AGL
above ground level
AGMA
American Gear Manufacturers Association
AGMEF
Ana G. Mendez Educational Foundation
AGNS
Allied General Nuclear Services (Barnwell, South Carolina)
AGS
– Alternating Gradient Synchrotron
– American Glovebox Society
AGU
American Geophysical Union
AGV
automatic guided vehicle
Ah
ampere-hour (preferred over "amp-hr") [convert to SI: coulomb (C)]
AHAM
Association of Home Appliance Manufacturers
AHC
advanced handling characteristic
AHE
annual heating energy
AHERA
Asbestos Hazard Emergency Response Act
AHF
anhydrous hydrogen fluoride
AHJ
Authority Having Jurisdiction
AHL
annual heating load
AHMRTS
Automated Hazardous Materials Retrieval and Tracking System
AHP
– absorption heat pump
– analytic hierarchy process
AHPS
auxiliary heater power supply
AHPT
absorption heat pump test
AHS
Assured Health Systems
AHU
air handling unit
AHX
accumulator heat exchanger
ai
Airy function (math)
AI
Administration Information (bulletins)
AI
– Adobe Illustrator
– air-to-air intercept
– artificial intelligence
– Atomic International
– Soil Absorption Isotherm (AI) Test
AIA
American Institute of Architects
AIAA
American Institute of Aeronautics and Astronautics
AIBS
American Institute of Biological Sciences
AIC
– acceptable daily level for chronic intake
– advanced industrial concept
– alternate information center
– American Institute of Chemists
AIChE
American Institute of Chemical Engineers
AICPA
American Institute of Certified Public Accountants
AICS
Automated Inventory Control System
AICUZ
Air Installation Compatible Use Zone
AID
U.S. Agency for International Development
AIDS
Acquired Immune Deficiency Syndrome
AIF
Atomic Industrial Forum
AIG
American International Group
AIH
American Institute of Hydrology
AIHA
American Industrial Hygiene Association
AIHC
American Industrial Health Council
AIIE
American Institute of Industrial Engineers, Inc.
AILT
American Institute for Life Technologies
AIM
– accelerator improvement and modification
– Acquisition Information Management
– advanced industrial material
– Artificial Intelligence Manipulator
AIMD
Aircraft Intermediate Maintenance Division
AIME
American Institute of Mining, Metallurgical, and Petroleum Engineers
AIMS
Advanced Integrated Maintenance System
AIP
– Accelerator Improvements Project
– agreement in principle
AIPC
All Indian Pueblo Council
AIPE
American Institute of Plant Engineers
AIR
AiResearch Manufacturing Company of California
air hp
air horsepower
AIRD
Acoustic Instrumentation Research and Development (of SDT)
AIRFERRON
Aircraft Ferry Squadron
AIRHAS
Airborne Hazardous Substances (program)
AIRS
Advanced Instrumentation for Reflood Studies
AiS
Adventures in Supercomputing [DOE program (state of Tennessee and ORNL)]
AIS
– Absentee Inquiry System
– Advanced Isotope Separation
– Argonne, Illinois, Site
– Automated Information System
AISB
Association of Imaging Service Bureaus
AISC
– American Institute of Steel Construction
– (U.S.) Army Information System Command
AISI
American Iron and Steel Institute
AISN
Adventures in Supercomputing Network
AISP
Association of Information Systems Professionals
AIT
– Accident Investigation Team (DOE)
– action initiation time
AJHA
Automated Job Hazard Analysis
AK
Alaska (use only with ZIP code addresses)
Al
aluminum (element, Z = 13)
AL
– Alabama (use only with ZIP code addresses)
– Albuquerque Operations Office (DOE)
– sound level on the A-weighted scale expressed in decibels
Al2O3
– alumina
– aluminum oxide
Al2S3
aluminum sulfide
ALA
American Lung Association
Ala.
Alabama (use after city names in references, lists, tables, footnotes, bibliographies, and indexes; spell out in text)
ALARA
as low as reasonably achievable
Alaska
(not an abbreviation; spell out this state name unless it is used with ZIP code addresses; use after city names in text, references, lists, tables, footnotes, bibliographies, and indexes)
ALBIOS
Aluminum Biogeochemistry in Soils
ALBURT
Albuquerque Budget Reform Task
ALC
Air Logistics Center (USAF)
ALCHEMI
axial electron channeling microanalysis
AlCl3
aluminum chloride
Alcoa
Aluminum Company of America
ALD
Advanced Leadership Development (ESTD)
ALERT
Associated Laboratories for Excellence in Radiation Technology
ALI
annual limits on intake
ALIPS
Automated Laser-Induced Phosphorimeter System
ALLLWSAP
Active Liquid Low-Level Waste Assurance Program
ALm
maximum A-weighted sound level
ALMA
Analytical Laboratory Managers Association
ALMR
advanced liquid-metal (-cooled) reactor
ALO
Albuquerque Operations Office (DOE)
ALP
Ammunitions Logistics Program (RPSD)
ALR
Advanced Logic Research (a company name)
ALS
– Adirondack Lake Survey (ALSC)
– Advanced Launch System
– Advanced Light Source
ALSC
Adirondack Lake Survey Corporation
ALSS
Aluminum in Streams Study (EPRI project)
alt
altitude
ALT-II
Advanced Limiter Test II
ALU
arithmetic logic unit
ALWR
advanced light-water reactor
Am
americium (element, Z = 95)
AM
– air mass (solar)
– amplitude modulation (electronics)
– annulus mixing
AMA
– American Management Association
– American Medical Association
AMAD
activity median aerodynamic diameter
AMARC
Aircraft Maintenance and Regeneration Center(Arizona)
AMC
– Air Mobility Command (Air Force)
– American Mining Congress
– Army Materiel Command
AMCA
Air Movement and Control Association
AMCC
Administrative Management Coordinating Council
AMCCOM
Armament, Munitions and Chemical Command (U.S. Army)
AMCO
Aerojet Manufacturing Company (Fullerton, California)
AMCR
Army Materiel Command Regulation
AMDL
Advanced Machine Development Laboratory
AMERD
Assistant Manager for Energy Research and Development
AMERWM
Assistant Manager for Environmental Restoration and Waste Management
AMESQ
Assistant Manager for Environment, Safety, and Quality
AMEX
American Stock Exchange
AMFIP
Acoustic Measurements Facilities Improvement Program
AMFIP-I
Acoustic Measurements Facilities Improvement Program, Phase I
AMFIP-II
Acoustic Measurements Facilities Improvement Program, Phase II
AML
– abandoned mine land
– acute myelogenous leukemia
AMP
– aminomethylpyridine
– Army Materiel Plan
AMP MOD
Army Materiel Plan Modernization (project)
amp-hr
ampere-hour ("Ah" is preferred) [convert to SI: coulomb (C)]
AMPTIAC
Advanced Materials and Processes Technology Information Analysis Center
AMS
– accident monitoring system
– advanced manipulator system
– aerial measurement system
– air monitoring station
– American Mathematical Society
– American Meteorological Society
– Avionics Maintenance Squadron
AMSA
Area Material and Support Activity
AMSE
American Museum of Science and Energy (Oak Ridge)
AMSEQ
Assistant Manager of Safety, Environment, and Quality
AMSL
– Analytical Mass Spectrometry Laboratory
– above mean sea level (see MSL and NGVD)
AMTEX
American Textile Manufacturers Association
amu
atomic mass unit (preferred over "AMU")
AMU
– Aircraft Maintenance Unit
– atomic mass unit ("amu" is preferred)
AN
anthracene
ANAD
Anniston Army Depot
AnaLIS
Analytical Laboratory Information System
ANC
acid-neutralizing capability/capacity
AND gate
"AND" is not an abbreviation (see OR gate)
ANDF
Application-Neutral Data Format (computer technology)
ANET
American Network for Environment and Technology
ANFLOW
Anaerobic Packed-Bed Upflow Bioreactor
ANG
Air National Guard
ANGB
Air National Guard Base
ANGSC
Air National Guard Support Center
ANL
Argonne National Laboratory (Argonne, Illinois)
ANL-E
Argonne National Laboratory-East (Chicago)
ANL-W
Argonne National Laboratory-West [as of Feb. 1, 2005, INEEL and ANL-W became the Idaho National Laboratory (INL)]
ANMC
American National Metric Council
ANN
artificial neural network
ANO
Arkansas Nuclear One (AP&LC)
ANOI
Advance Notice of Intent
ANOVA
analysis of variance test
ANP
Aircraft Nuclear Propulsion (Project)
ANPEO
assistant nuclear plant equipment operator
ANPRM
advanced notice of proposed rulemaking
ANRL
Arctic Naval Research Laboratory
ANRT
Advanced Nonproliferation Resistance Technology
ANS
– Advanced Neutron Source (formerly CNR)
– American Nuclear Society
ANSDS
automated noise surveillance and diagnostic system
ANSI
American National Standards Institute, Inc.
ANSI/ANS
American National Standards Institute/American Nuclear Society
ANSI/ASME
American National Standards Institute/American Society of Mechanical Engineers
ANSim
neural network simulation program
ANSR
Advanced Neutron Source reactor
antilog
antilogarithm
ANWR
– Alaska National Wildlife Refuge
– Arctic National Wildlife Refuge
ao
initial slot length
AO
– administrative order
– rock salt
AOA
airborne optical adjunct
AOC
area of contamination (RCRA)
AODC
acridine orange direct count
AOHP
add-on heat pump
AOI
– abnormal operating instruction
– avoid oral instructions
AOMA
American Occupational Medical Association
AOO
anticipated operational occurrence
AOP
– add-on plant
– advanced oxidation process
– Annual Operating Plan
AOSC
assistant on-scene commander
AOSTD
associate off-site technical director
AOT
auxiliary operator's terminal
AP
– administrative procedure
– Alaska Power Adminstration
– approach-to-power (procedure)
– array processor
AP&LC
Arkansas Power and Light Company
APA
– Adirondack Park Agency
– alkaline phosphatase activity
– Administrative Procedure Act
APAT
Administrative Procedures Authoring Tool
APB
antiphase boundary
APC
– Accident Prevention Council
– air pollution control
APCA
– Air Pollution Control Association
– Association of Air Pollution Control Administration
APCD
air pollution control district
APD
avalanche photodetector
APDMS
axial power distribution monitoring system
APDU
Association of Public Data Users
APEC
Automated Procedures for Engineering Consultants, Inc.
APF
annual performance factor
APFIM
atom-probe field-ion microscopy
APG
Aberdeen Proving Ground
APHA
American Public Health Association
API
– Advanced Photonics Initiative (ORNL)
– American Paper Institute
– American Petroleum Institute
– application programming interface
APICS
American Production and Inventory Control Society
APIS
acoustic peak identification system
APMP
Acid Precipitation Mitigation Program (NAPAP)
APNEA
Active Passive Neutron Examination and Assay (P&E)
APO
– Air Post Office
– Analytical Project Office
– Army Post Office
– auxiliary plant operator
APP
– Application Portability Profile (NIST)
– automated procedure prompting
APPA
American Public Power Association
APPDP
AVLIS Product Purification Demonstration Project
appm
atomic parts per million
APPR
Army Package Power Reactor
APRAS
Automated Procedures Requirements Accountability System
APRB
Assessments Prioritization and Risk Board
APRF
Army Pulse Radiation Facility
APRFR
Army Pulse Radiation Facility Reactor
APRM
average power range monitor (see LPRM)
APS
– Aerial Port Squadron
– American Physical Society
APSC
Advanced Processing Science Center
APSD
autopower spectral density
APSS
assistant plant shift superintendent
APT
Advanced Publishing Technology (ORNL)
APTC
Advanced Propulsion Technology Center
APTD
Advanced Publishing Technology Department
APWR
advanced pressurized-water reactor
APZ
accident potential zone
AQA
American Quaternary Association
AQCC
Air Quality Control Center
AQCR
Air Quality Control Region
AQF
American Quality Foundation
AQL
acceptable quality level
AQM
Applied Quantitative Methods (Group of TSRS)
AQMA
Air Quality Maintenance Area
AQMD
Air Quality Management District
AQWMA
Air Quality and Waste Management Association
Ar
argon (element, Z = 18)
AR
Administrative Reference (bulletins)
AR
– Administrative Record
– antireflection (coating)
– Argonne Area Office (DOE)
– Arkansas (use only with ZIP code addresses)
– as received
– authorized requestor
– autoregression
AR&TD
Advanced Research and Technology Development (DOE)
ARA
auxiliary reactor area
ARAC
– Acid Rain Advisory Committee
– atmospheric release advisory capability
ARAMCO
Arabian American Oil Company
ARAP
Aquatic Resources Alteration Permit
ARAR
applicable or relevant and appropriate regulation/requirement
ARB
Air Resources Board
ARC
– American Red Cross
– Ames Research Center
– Annual Report to Congress
– Appalachian Regional Commission
– Appliance Research Consortium
– Assessment and Remediation of Contaminated Sediments
ARCADES
Automatic RADIAC calibration and diagnostic equipment system
ARCCC
Accident Response Capabilities Coordinating Committee
ARCF
Alternative Refrigerants Calorimeter Facility
ARCOM
U.S. Army Reserve Command
ARCSS
Arctic System Sciences (NSF)
ARDEC
Armament Research, Development, and Engineering Center (U.S. Army)
ARE
– Aircraft Reactor Experiment
– algebraic Riccati equation
– aspect ratio enhancement
AREFG
Air Refueling Group (USAF)
ARELM
Alaska Railbelt Electricity Load Model
ARF
– airborne release fraction
– Air Reserve Forces (AFRES and ANG)
arg
argument (math)
ARG
Accident Response Group
ARHCO
Atlantic Richfield Hanford Company
ARI
– Air-Conditioning and Refrigeration Institute
– alternate rod injection
ARIAP
Acid Rain Impact Assessment Program
ARIES
Advanced Reactor Innovation and Evaluation Studies
ARIHE
Association of Russian Institutions of Higher Education
ARIM
Accelerator and Reactor Improvement and Modification
ARIMA
Autoregressive Integrated Moving Average (model)
ARIP
Accident Release Information Program
Ariz.
Arizona (use after city names in references, lists,tables, footnotes, bibliographies, and indexes; spell out in text)
ARK
Acquisition of and Reasoning about Knowledge
Ark.
Arkansas (use after city names in references, lists, tables, footnotes, bibliographies, and indexes; spell out in text)
ARL
U.S. Army Research Laboratory
ARM
– Alternative Resource Management, Inc.
– appliance research meter
– Atmospheric Radiation Measurement (Program) (DOE)
ARMA
Association of Records Managers and Administrators
ARMS
– Aerial Radiological Monitoring System
– appliance research metering system
– Area Radiation Monitor System
ARNG
Army National Guard
ARO
after receipt of order
ARPA
Advanced Research Projects Agency (DOD)
ARRA
American Recovery and Reinvestment Act of 2009
ARRG
Aerospace Rescue and Recovery Group
ARRI
All-Russian Research Center (HIWDC)
ARRL
Advanced Robotics Research Laboratory
ARRT
American Registry of Radiologic Technologists
ARS
Administrative Requirement for Safety
ARSRC
Accelerators and Radiation Sources Review Committee
ART
– Adaptive Resonance Theory
– Airborne Response Team
– Aircraft Reactor Test
– Air Reserve technician
ARTCC
Air Route Traffic Control Center
ARTEP
Annual Required Training and Evaluation Program
As
arsenic (element, Z = 33)
AS
– annual savings
– assessment study
– aviation safety
AS-KCD
Atomic Signal-Kansas City Division
ASA
– American Sociological Association
– American Statistical Association
– atomic sphere approximation
– auditable safety analysis
– AVID System authorization
ASAE
American Society of Agricultural Engineers
ASAT
antisatellite weapon
ASB
Association of Southeastern Biologists
ASC
– administrative services contractor
– advanced slagging combustor
ASCE
– American Society of Civil Engineers
– Assistant Secretary for Conservation and Renewable Energy
ASCET
American Society of Certified Engineering Technicians
ASCF
Army Signature Characterization Facility
ASChE
American Society of Chemical Engineers
ASCI
Accelerated Strategic Computing Initiative
ASCII
American Standard Code for Information Interchange
ASCL
Advanced Continuous Simulation Language
ASCLD
American Association for Crime Laboratory Directors
ASCOT
Atmospheric Studies in Complex Terrain
ASCS
U.S. Agricultural Stabilization and Conservation Service
ASD
– Analytical Services Division (K-25)
– assembly station director
ASDP
Assistant Secretary for Defense Programs
ASE
– Advanced Systems Engineering
– Alliance to Save Energy
ASEE
American Society for Engineering Education
ASEM
– American Society for Engineering Management
– Assistant Secretary for Environmental Restoration and Waste Management
ASES
American Solar Energy Society
ASESH
Assistant Secretary for Environment, Safety, and Health
ASF
– Aircraft support facility
– automatic safety feature
ASFE
Assistant Secretary for Fossil Energy
ASG
Automated Sciences Group, Inc.
ASGDI
atmospheric-sampling glow discharge ionization
ASHP
air-source heat pump
ASHRAE
American Society of Heating, Refrigerating and Air-Conditioning Engineers
ASI
– acidic stress index
– Advanced Sciences, Inc.
ASIC
application-specific integrated circuit
ASIDIC
Association of Scientific Information Dissemination Centers
ASIE
American Society of Illumination Engineers
ASIS
– American Society for Industrial Security
– American Society for Information Science
ASISWPCA
Association of State and Interstate Water Pollution Control Administrations/Administrators
ASL
American Sign Language
ASLAB
Atomic Safety and Licensing Appeal Board
ASLB
Atomic Safety Licensing Board
ASLO
American Society of Limnology and Oceanography
ASM
– advanced servomanipulator
– American Society of Microbiology
– Applied Simulation and Modeling
ASM International
This undefined acronym is used by the Materials Information Society (formerly American Society for Metals)
ASME
American Society of Mechanical Engineers
ASNE
Assistant Secretary for Nuclear Energy
ASNT
American Society for Nondestructive Testing, Inc.
ASO
Analytical Services Organization
ASP
acoustic signal processor
ASPC
Advanced Semiconductor Processing Center
ASPE
American Society of Precision Engineers
ASPEN
Advance System for Process Engineering
ASPEP
American Society of Professional Emergency Planners
ASPP
American Society of Plant Physiologists
ASPUR
Automated System for Processing Unit Requirements
ASQC
American Society for Quality Control
ASSE
American Society of Safety Engineers
ASSESS
Analytical System and Software for Evaluating Safeguards and Security
ASSS
actual safety system setting
AST
– aboveground storage tank
– advanced systems technology
ASTD
American Society for Training and Development
ASTG
Aerospace Test Group
ASTM
American Society for Testing and Materials (Philadelphia)
ASTSWMO
Association of State and Territorial Solid Waste Management Officials
ASW
antisubmarine warfare
ASWE
American Society of Women Engineers
ASWS
air support weather shield
ASZ
American Society of Zoologists
At
astitine (element, Z = 85)
AT
– Applied Technology
– Atlanta Support Office (DOE)
AT&SF
Atchison, Topeka and Santa Fe Railway
AT&T
American Telephone and Telegraph Company
at. %
atomic percent
at. wt
atomic weight
ATA
– Airport traffic area
– Automatic Target Acquisition (system)
ATACMS
Army Tactical Air Command Missile System
ATB
Advanced Technology Bomber
ATC
– air traffic control (center)
– Air Training Command
– Applied Technology Council
– auto-tuning controller
ATCM
Association for Total Cost Management
ATD
Applied Technology Division (formerly ETAC; now ETD)
ATDD
Atmospheric Turbulence and Diffusion Division (formerly ATDL; NOAA at Oak Ridge)
ATDL
Atmospheric Turbulence and Diffusion Laboratory (now ATDD; NOAA at Oak Ridge)
ATE
automatic testing equipment
ATEA
American Technical Education Association
ATES
aquifer thermal energy storage
ATF
Advanced Toroidal Facility
ATI
– Administrative Technology Institute
– American Technical Institute
ATIS
Advanced Traveler Information Systems
ATL
Applied Technology Library (K-25) (now KIRC)
ATLA
Association of Trial Lawyers of America
ATLAS
All-Terrain Lifter, Articulated System
ATLC
Atomic Trades and Labor Council
atm
atmosphere [convert to SI: pascal (Pa)]
ATM
– Atmospheric Transport Model
– Attic Test Module (RRC)
– automatic teller machine
ATMS
– articulated manipulator-transporter system
– Assumption-Based Truth Maintenance System
– Automated Transportation Management System
ATMTC
Advanced Transportation Management Training Center
ATO
Applied Technology Organization
ATP
– Acceptance Test Plan
– adenosine triphosphate
– alternate test procedure
ATR
– advanced test reactor
– automatic target recognition
ATS
Accountable Training System (replaced by TMS)
ATSC
Administrative Technical Support Complex
ATSDR
Agency for Toxic Substances and Disease Registry
ATSER
Agency for Toxic Substances and Emergency Response
ATSF
Advanced Technology Support Facility
ATTF
Advanced Technology Test Facility
ATV
auxiliary telephone vault
ATWS
– anticipated transients without scram
– anticipated transients with scram
Au
gold (element, Z = 79)
AUB
Athens Utilities Board (Tennessee)
AUEL
Automated Unit Equipment List
AUO
assistant unit operator
av
average
AV
acoustic velocity (geophysical logging)
AVC
adjustable vane compressor
AVD
acoustic variable density (geophysical logging)
AVGAS
aviation gasoline
AVHRR
advanced very high resolution radiometer
AVID
Accelerated Vendor Inventory Delivery
AVLIS
Atomic Vapor Laser Isotope Separation
AVR
– Arbeitsge-meinschaft Versuchs Reaktor (KFA, Jülich, Germany)
– attic ventilation area ratio
AVS
– Advanced Visual Systems
– American Vacuum Society
– Application Visualization System (computer software)
AVSGTS
annulus vacuum standby gas treatment system
AWACS
Airborne Warning and Control System
AWDB
Adirondack Watershed Data Base
AWE
Atomic Weapons Establishment (Aldermaston, England)
AWEA
American Wind Energy Association
AWG
American Wire Gage
AWI
American Welding Institute
AWIS
Association for Women in Science
AWIS-ETC
Association for Women in Science, East Tennessee Chapter
AWLPG
Albuquerque Operations Work Load Planning Guidance
AWOL
absent without leave
AWPCF
Air and Water Pollution Control Facilities
AWQC
ambient water quality criteria
AWRA
American Water Resources Association
AWRE
Atomic Weapon Research Establishment (U.K.)
AWS
– alternative work schedule
– American Welding Society
– Approved Work Scope
– Association for Women in Science
AWWA
American Water Works Association
AWWT
Advanced Wastewater Treatment
AX
auxiliary system
AXAF
Advanced X-Ray Astrophysical Facility (Lockheed Martin Corp. satellite)
AZ
Arizona (use only with ZIP code addresses)