This list of UK and US government abbreviations and acronyms is constantly being researched and updated with links being checked and added/updated regularly.
This is a searchable database. If there we have missed something please let us know.
| Abbreviation | Meaning | Country |
|---|---|---|
| AAPC | Accounting and Auditing Policy Committee | United States |
| ABMC | American Battle Monuments Commission | United States |
| ACC | Air Combat Command | United States |
| ACDA | United States Arms Control and Disarmament Agency | United States |
| ACF | Administration for Children and Families | United States |
| ACHP | Advisory Council on Historic Preservation | United States |
| ACSES | Annual Civil Service Employment Survey (ONS dataset) | United Kingdom |
| ACSL | Alternate Crops and Systems Lab | United States |
| ACYF | Administration for Children, Youth, and Families | United States |
| ADA | Americans with Disabilities Act of 1990 (Text of ADA legation) | United States |
| ADB | Asian Development Bank | United States |
| ADC | Program Against Digital Counterfeiting of Currency | United States |
| ADD | Administration on Developmental Disabilities | United States |
| AFDB | African Development Bank | United States |
| AFDC | Aid to Families with endent Children | United States |
| AFIS | American Forces Information Service | United States |
| AFRC | Air Force Reserve Command | United States |
| AFRL | Air Force Research Laboratory | United States |
| AFROTC | Air Force Reserve Officer TringCorps | United States |
| AFRTS | Armed Forces Radio and Television Service | United States |
| AFS | Air Facility Sub-System | United States |
| AFSC | Armed Forces Staff College (replaced by JFSC) | United States |
| AFSPC | Air Force Space Command | United States |
| AGO | Attorney General’s Office | United Kingdom |
| AGRICOLA | Agricultural OnLine Access | United States |
| AHCPR | Agency for Health Care Policy and Research (changed to AHRQ) | United States |
| AHPCRC | Army High Performance Computing Research Center | United States |
| AHRQ | Agency for Healthcare Research and Quality | United States |
| AHS | American Housing Survey | United States |
| AID | Agency for International Development | United States |
| AIRS | Aerometric Information Retrieval System (changed to AFS) | United States |
| AME | Annually Managed Expenditure | United Kingdom |
| AMES | Ames Laboratory | United States |
| AMS | Agricultural Marketing Service | United States |
| Amtrak | National Railroad Passenger Corporation | United States |
| ANA | Administration for Native Americans | United States |
| ANG | Air National Guard | United States |
| ANL | Argonne National Laboratory | United States |
| AO/AA | Administrative officer/administrative assistant (civil service grade) | United Kingdom |
| AOA | Administration on Aging | United States |
| APA | Asset Protection Agency | United Kingdom |
| APHIS | Animal and Plant Health Inspection Service | United States |
| API | Application Programming Interface | United Kingdom |
| AR | Annual Report | United Kingdom |
| ARB | Administrative Review Board | United States |
| ARBA | Army Review Boards Agency | United States |
| ARC | Appalachian Regional Commission | United States |
| ARL | Army Research Laboratory | United States |
| ARNet | Acquisition Reform Network | United States |
| ARPA | Advanced Research Projects Agency | United States |
| ARS | Agricultural Research Service | United States |
| ATF | Bureau of Alcohol, Tobacco and Firearms | United States |
| ATSDR | Agency for Toxic Substances and Disease Registry | United States |
| BARC | Beltsville Agricultural Research Center | United States |
| BEA | Bureau of Economic Analysis | United States |
| BEIS | Department for Business, Energy and Industrial Strategy | United Kingdom |
| BEP | Bureau of Engraving and Printing | United States |
| BERR | Department for Business, Enterprise and Regulatory Reform | United Kingdom |
| BEST | Biomonitoring of Environmental Status and Trends | United States |
| BFRL | Building and Fire Research Laboratory | United States |
| BHPr | Bureau of Health Professions | United States |
| BIA | Bureau of Indian Affairs | United States |
| BIC | Business Information Center | United States |
| BIMAS | BioInformatics Molecular Analysis Section | United States |
| BIS | Department for Business, Innovation and Skills | United Kingdom |
| BIS | Bureau of Industry and Security | United States |
| BJA | Bureau of Justice Assistance | United States |
| BJS | Bureau of Justice Statistics | United States |
| BLM | Bureau of Land Management | United States |
| BLS | Bureau of Labor Statistics | United States |
| BMDO | Ballistic Missile Defense Organization | United States |
| BNA | Bureau of National Affairs | United States |
| BOP | Federal Bureau of Prisons | United States |
| BOR | Bureau of Reclamation | United States |
| BPA | Bonneville Power Administration | United States |
| BPD | Bureau of the Public Debt | United States |
| BPHC | Bureau of Primary Health Care | United States |
| BRB | Benefits Review Board | United States |
| BRD | Biological Resource Division | United States |
| BRFSS | Behavioral Risk Factor Surveillance System | United States |
| BSC | Business Service Centers | United States |
| BTS | Bureau of Transportation Statistics | United States |
| BUD | Budget | United Kingdom |
| BVA | Board of Veterans Appeals | United States |
| CAGE | Commercial and Government Entity | United States |
| CAME | Capital Annually Managed Expenditure | United Kingdom |
| CBD | Commerce Business Daily | United States |
| CBER | Center for Biologics Evaluation and Research | United States |
| CBIAC | Chemical and Biological Defense Information Analysis Center | United States |
| CBO | Congressional Budget Office | United States |
| CCB | Child Care Child Care Bureau | United States |
| CCC | Commodity Credit Corporation | United States |
| CCR | Commission on Civil Rights | United States |
| CDBG | Community Development Block Grants | United States |
| CDC | Centers for Disease Control | United States |
| CDEL | Capital Departmental Expenditure Limit | United Kingdom |
| CDER | Center for Drug Evaluation and Research | United States |
| CDFI | Community Development Financial Institutions | United States |
| CDRH | Center for Devices and Radiological Health | United States |
| CEA | Council of Economic Advisers | United States |
| CEDR | Comprehensive Epidemiologic Data Resource | United States |
| CEN | Bureau of the Census | United States |
| CEOS | Child Exploitation and Obscenity Section | United States |
| CEPPO | Chemical Emergency Preparedness and Prevention Office | United States |
| CEPS | Center for Earth and Planetary Studies | United States |
| CEQ | Council on Environmental Quality | United States |
| CERCLIS | Comprehensive Environmental Response, Compensation, &; Liability Information System | United States |
| CETEC | Topographic Engineering Center | United States |
| CFDA | Catalogue of Federal Domestic Assistance | United States |
| CFOC | Chief Financial Officers Council | United States |
| CFR | Code of Federal Regulations | United States |
| CFSAN | National Center for Food Safety and Applied Nutrition | United States |
| CFTC | Commodity Futures Trading Commission | United States |
| CHAMPVA | Civilian Health and Medical Program of the Department of Veterans Affairs | United States |
| CHID | Combined Health Information Database | United States |
| CIA | Central Intelligence Agency | United States |
| CIAO | Critical Infrastructure Assurance Office | United States |
| CIC | Consumer Information Center | United States |
| CID | U.S. Army Criminal Investigation Command | United States |
| CIPRIS | Coordinated Interagency Partnership Regulating International Students | United States |
| CIT | Center for Information Technology | United States |
| CITES | Convention on International Trade in Endangered Species of Wild Fauna and Flora | United States |
| CMHS | Center for Mental Health Services | United States |
| CMS | Centers for Medicare and Medicaid Services | United States |
| CMV | Center for Minority Veterans | United States |
| CNPP | Center for Nutrition Policy and Promotion | United States |
| CNS | Corporation for National Service | United States |
| CO | Cabinet Office | United Kingdom |
| CO | CO Cabinet Office | United Kingdom |
| Conrail | Consolidated Rail Corporation | United States |
| CONSER | Cooperative Online Serials | United States |
| COP | Coastal Ocean Program | United States |
| COPS | Office of Community Oriented Policing Services | United States |
| CPI | Consumer Price Index | United States |
| CPMS | Defense Civilian Personnel Management Service | United States |
| CPO | Corrections Program Office | United States |
| CPSC | Consumer Product Safety Commission | United States |
| CRC | Civil Rights Center | United States |
| CRISP | Computer Retrieval of Information on Scientific Projects | United States |
| CRP | Conservation Reserve Program | United States |
| CRS | Congressional Research Service; Community Relations Service | United States |
| CSAP | Center for Substance Abuse Prevention | United States |
| CSAT | Center for Substance Abuse Treatment | United States |
| CSB | Chemical Safety and Hazard Investigation Board | United States |
| CSE | Office of Child Support Enforcement | United States |
| CSI | Center for the Study of Intelligence | United States |
| CSPS | Civil Service People Survey (Cabinet Office dataset) | United Kingdom |
| CSR | Center for Scientific Review | United States |
| CSREES | Cooperative State Research, Education, and Extension Service | United States |
| CTEP | Cancer Therapy Evaluation Program | United States |
| CUAP | College and University Affiliations Program | United States |
| CWC | Chemical Weapons Convention | United States |
| CxD | Chancellor’s Departments (APA, DMO, GAD, HMRC, HMT, NS&I, OBR) | United Kingdom |
| DA | Department of the Army | United States |
| DARPA | Defense Advanced Research Projects Agency | United States |
| DAU | Defense Acquisition University | United States |
| DCAA | Defense Contract Audit Agency | United States |
| DCLG | Department for Communities and Local Government | United Kingdom |
| DCMS | Department for Culture, Media and Sport | United Kingdom |
| DCSF | Department for Children, Schools and Families | United Kingdom |
| DDC | Defense Distribution Center | United States |
| DE&S | Defence Equipment and Support (part of MoD) | United Kingdom |
| DEA | Drug Enforcement Administration | United States |
| DeCA | Defense Commissary Agency | United States |
| DECC | Department of Energy and Climate Change | United Kingdom |
| Defra | Department for Exiting the European UnionDepartment for Environment, Food and Rural Affairs | United Kingdom |
| DEL | Departmental Expenditure Limit | United Kingdom |
| DESA | Economic and Social Council | United States |
| DESC | Defense Energy Support Center | United States |
| DETR | Department of the Environment, Transport and the Regions | United Kingdom |
| DFAS | Defense Finance and Accounting Service | United States |
| DfE | Department for Education | United Kingdom |
| DfEE | Department for Education and Employment | United Kingdom |
| DfES | Department for Education and Skills | United Kingdom |
| DfID | Department for International Department for International Trade | United Kingdom |
| DfT | Department for Transport | United Kingdom |
| DH | Department of Health | United Kingdom |
| DIA | Defense Intelligence Agency | United States |
| DINFOS | Defense Information School | United States |
| DISA | Defense Information Systems Agency | United States |
| DIT | Department for International Trade | United Kingdom |
| DIUS | Department for Innovation, Universities and Skills | United Kingdom |
| DLA | Defense Intelligence Agency | United States |
| DLAPS | Defense Logistics Agency Publishing System | United States |
| DLIS | Defense Logistics Information Service | United States |
| DLSA | Defense Legal Services Agency | United States |
| DMDC | Defense Manpower Data Center | United States |
| DMO | Debt Management Debt Management Office | United Kingdom |
| DNFSB | Defense Nuclear Facilities Safety Board | United States |
| DNSC | Defense National Stockpile Center | United States |
| DOC | Department of Commerce | United States |
| DOD | Department of Defense | United States |
| DODEA | Department of Defense Education Activity | United States |
| DoDISS | DoD Index of Specifications and Standards | United States |
| DoDSSP | Single Stock Point for Specifications and Standards | United States |
| DOE | Department of Energy | United States |
| DOI | Department of the Interior | United States |
| DOJ | Department of Justice | United States |
| DOL | Department of Labor | United States |
| DORRA | DLA Office of Operations Research and Resource Analysis | United States |
| DOS | Department of State | United States |
| DOT | Department of Transportation | United States |
| DPC | Domestic Policy Council | United States |
| DPCP | DPCP Department of Prices and Consumer Protection | United Kingdom |
| DPL | Denied Persons List | United States |
| DPM | Deputy Prime Minister | United Kingdom |
| DPMO | Defense Prisoner of War/Missing Personnel Office | United States |
| DRMS | Defense Reutilization and Marketing Service | United States |
| DSCA | Defense Security Cooperation Agency | United States |
| DSS | Defense Security Service | United States |
| DTIC | Defense Technical Information Center | United States |
| DTLR | Department of Transport, Local Government and the Regions | United Kingdom |
| DTRA | Defense Threat Reduction Agency | United States |
| DVLA | Driver and Vehicle Licensing Agency (part of DfT) | United Kingdom |
| DWP | Department for Work and Pensions | United Kingdom |
| EAR | Export Administration Regulations | United States |
| ECA | Bureau of Educational and Cultural Affairs | United States |
| ECI | National Institute on Early Childhood Development and Education | United States |
| ECIE | Executive Council on Integrity and Effiency | United States |
| ECOSOC | Economic and Social Council | United States |
| ECP | Emergency Conservation Program | United States |
| ED | Department of Education | United States |
| EDA | Economic Development Administration | United States |
| EDGAR | Electronic Data Gathering, Analysis, and Retrieval | United States |
| EEOC | Equal Employment Opportunity Commission | United States |
| EHP | Environmental Health Perspectives | United States |
| EIA | Energy Information Administration | United States |
| EIS | Epidemic Intelligence Service | United States |
| EM | Office of Environmental Management | United States |
| EML | Environmental Measurement Laboratory | United States |
| ENC | Eisenhower National Clearinghouse | United States |
| EO | Executive Order | United States |
| EO | Executive officer (civil service grade) | United Kingdom |
| EOAF | Executive Office for Asset Forfeiture | United States |
| EOIR | Executive Office for Immigration Review | United States |
| EOUSA | Executive Office for United States Attorneys | United States |
| EOWS | Executive Office of Weed and Seed | United States |
| EPA | Environmental Protection Agency | United States |
| EREN | Energy Efficiency and Renewable Energy Network | United States |
| ERG | Efficiency and Reform Group (part of CO) | United Kingdom |
| ERIC | Educational Resources Information Center | United States |
| ERL | Environmental Research Laboratories | United States |
| EROD | Education Resource Organizations Directory | United States |
| ERS | Economic Research Service | United States |
| ESA | Employment Standards Administration; Economics and Statistics Administration | United States |
| ESDIM | Environmental Services Data and Information Management | United States |
| ETA | Employment and Training Administration | United States |
| Ex-Im Bank | Export-Import Bank of the United States | United States |
| FAA | Federal Aviation Administration | United States |
| Fannie Mae | Federal National Mortgage Association | United States |
| FAO | Food and Agriculture Organization | United States |
| FAR | Federal Acquisition Regulation | United States |
| Farmer Mac | Federal Agricultural Mortgage Corporation | United States |
| FAS | Federal Agricultural Mortgage Corporation | United States |
| FASAB | Federal Accounting Standards Advisory Board | United States |
| FBI | Federal Bureau of Investigation | United States |
| FBIS | Foreign Broadcast Information Service | United States |
| FCA | Farm Credit Administration | United States |
| FCC | Federal Communications Commission | United States |
| FCIC Federal | Consumer Information Center; Federal Crop Insurance Corporation | United States |
| FCO | Foreign and Commonwealth Office | United Kingdom |
| FDA | Food and Drug Administration | United States |
| FDIC | Federal Deposit Insurance Corporation | United States |
| FEC | Federal Election Commission | United States |
| FEDRIP | Federal Research in Progress Database | United States |
| FEMA | Federal Emergency Management Agency | United States |
| FERC | Federal Energy Regulatory Commission | United States |
| Fermilab | Fermi National Accelerator Laboratory | United States |
| FFB | Federal Financing Bank | United States |
| FHA | Federal Housing Administration | United States |
| FHFB | Federal Housing Finance Board | United States |
| FHWA | Federal Highway Administration | United States |
| FIA | Federal Insurance Administration | United States |
| FINCEN | Financial Crimes Enforcement Network | United States |
| FIPS | Federal Information Processing Standard | United States |
| FLC | Federal Laboratory Consortium | United States |
| FLETC | Federal Law Enforcement Training Center | United States |
| FLRA | Federal Labor Relations Authority | United States |
| FMC | Federal Maritime Commission | United States |
| FMCS | Federal Mediation and Conciliation Service | United States |
| FMCSA | Federal Motor Carrier Safety Administration | United States |
| FMLA | Family and Medical Leave Act | United States |
| FMS | Financial Management Service | United States |
| FMSHRC | Federal Mine Safety and Health Review Commission | United States |
| FNCS | Food, Nutrition, and Consumer Services | United States |
| FNMA | Federal National Mortgage Association | United State |
| FNS | Food and NutSpecial rition Service | United States |
| FoI | Freedom of Information | United Kingdom |
| FOIA | Freedom of Information Act | United States |
| FOMC | Federal Open Market Committee | United States |
| FPDC | Federal Procurement Data Center | United States |
| FR | Register | United States |
| FRA | Federal Railroad Administration | United States |
| FRB | Federal Reserve Board | United States |
| FRS | Federal Reserve System; Federal Relay Service | United States |
| FRTIB | Federal Retirement Thrift Investment Board | United States |
| FS | Forest Service | United States |
| FSA | Farm Service Agency; Office of Federal Student Aid | United States |
| FSIS | Food Safety and Inspection Service | United States |
| FSS | Federal Supply Service | United States |
| FTA | Federal Transit Administration | United States |
| FTC | Federal Trade Commission | United States |
| FTE | Full-time equivalent | United Kingdom |
| FTS | Federal Technology Service | United States |
| FWS | Fish and Wildlife Service | United States |
| FYSB | Family and Youth Services Bureau | United States |
| G6, G7 | Grade 6 and Grade 7 (civil service grade | United Kingdom |
| GAD | Government Actuary’s Department | United Kingdom |
| GAO | General Accounting Office | United States |
| GATT | General Agreement on Tariffs and Trade | United States |
| GCMD | Global Change Master Directory | United States |
| GILS | Government Information Locator Service | United States |
| Ginnie Mae | Government National Mortgage Association | United States |
| GIPSA | Grain Inspection, Packers, and Stockyards Administration | United States |
| GIS | Geographic Information Systems | United States |
| GNIS | Geographic Names Information System | United States |
| GNMA | Government National Mortgage Association | United States |
| GPO | Government Printing Office | United States |
| GPRA | Government Performance and Results Act | United States |
| GPS | Global Positioning System | United States |
| GSA | General Services Administration | United States |
| GSFC | Goddard Space Flight Center | United States |
| GWA | Governmentwide Accounting Project Group | United States |
| GwoB | Government Without Boundaries | United States |
| HAB | HIV/AIDS Bureau | United States |
| HAC | Health Administration Center | United States |
| HCS | Home Civil Service (all civil servants in UK, Scottish and Welsh governments) | United Kingdom |
| Her | Majesty’s Treasury | United Kingdom |
| HHS | Department of Health and Human Services | United States |
| HIRS | Health Information Resources Service | United States |
| HMRC | Her Majesty’s Revenue and Customs | United Kingdom |
| HO | Home Office | United Kingdom |
| HPCC | High Performance Computing and Communications | United States |
| HRSA | Health Resources and Services Administration | United States |
| HSB | Head Start Bureau | United States |
| HUD | Department of Housing and Urban Development | United States |
| IA | Import Administration | United States |
| IACB | Indian Arts and Crafts Board | United States |
| IADRWG | Interagency Alternative Dispute Resolution Working Group | United States |
| IAEA | International Atomic Energy Agency | United States |
| IAEGC | Inter-Agency Electronic Grants Committee | United States |
| IAF | Inter-American Foundation | United States |
| IBB | International Broadcasting Bureau | United States |
| ICAF | Industrial College of the Armed Forces | United States |
| ICAO | International Civil Aviation Organization | United States |
| ICC | Interstate Commerce Commission | United States |
| IfG | Institute for Government | United Kingdom |
| IFRS | International Financial Reporting Standards | United Kingdom |
| IHS | Indian Health Service | United States |
| IIP | International Information Programs | United States |
| ILAB | Bureau of International Labor Affairs | United States |
| ILO | International Labour Organization | United States |
| IMLS | Institute of Museum and Library Services | United States |
| INEEL | Idaho National Engineering and Environmental Laboratory | United States |
| INF | Intermediate Range Nuclear Forces | United States |
| INL | Bureau for International Narcotics and Law Enforcement Affairs | United States |
| INS | Immigration and Naturalization Service | United States |
| INSS | Institute for National Strategic Studies | United States |
| INTERPOL | International Criminal Police Organization | United States |
| IO | Bureau of International Organization Affairs | United States |
| IOM | International Organization for Migration | United States |
| IPA | Infrastructure and Projects Authority (part of CO and HMT, successor to the MPA) | United Kingdom |
| IRMC | Information Resources Management College | United States |
| IRS | Internal Revenue Service | United States |
| IT | Information Technology | United Kingdom |
| ITA | International Trade Administration | United States |
| ITC | United States International Trade Commission | United States |
| JAG | Judge Advocate General | United States |
| JCS | Joint Chiefs of Staff | United States |
| JEC | Joint Economic Committee | United States |
| JFSC | Joint Forces Staff College | United States |
| JPL | Jet Propulsion Laboratory | United States |
| JSC | Johnson Space Center | United States |
| KAPL | Knolls Atomic Power Laboratory | United States |
| KSC | Kennedy Space Center | United States |
| LANL | Los Alamos National Laboratory | United States |
| Law | Law officers (AGO, Office of the Advocate General for Scotland) | United Kingdom |
| LBL | Ernest Orlando Lawrence Berkeley National Laboratory | United States |
| LLNL | Lawrence Livermore National Laboratory | United States |
| LOC | Library of Congress | United States |
| LOCIS | Library of Congress Information System | United States |
| LSC | Legal Services Corporation | United States |
| MAC | Market Access and Compliance | United States |
| MARAD | Maritime Administration | United States |
| MARVEL | Machine Assisted Realization of the Virtual Electronic Library | United States |
| MBDA | Minority Business Development Agency | United States |
| MCHB | Maternal and Child Health Bureau | United States |
| MCTL | Militarily Critical Technologies List | United States |
| MedPAC | Medicare Payment Advisory Commission | United States |
| MeSH | Medical Subject Headings | United States |
| MIGA | Multilateral Investment Guarantee Agency | United States |
| MMS | Minerals Management Service | United States |
| MMWR | Morbidity and Mortality Weekly Report | United States |
| MoD | Ministry of Defence | United Kingdom |
| MoG | Machinery of government | United Kingdom |
| MoJ | Ministry of Justice | United Kingdom |
| MPA | Major Projects Authority (part of CO) | United Kingdom |
| MSA | Metropolitan Statistical Area | United States |
| MSEL | Materials Science and Engineering Library | United States |
| MSHA | Mine Safety and Health Administration | United States |
| MSPB | Merit Systems Protection Board | United States |
| NACIC | National Counterintelligence Center | United States |
| NAFTA | North American Free Trade Agreement | United States |
| NAL | National Agricultural Library | United States |
| NAO | National Audit Office | United Kingdom |
| NARA | National Archives and Records Administration | United States |
| NARFE | National Association of Retired Federal Employees | United States |
| NASA | National Aeronautics and Space Administration | United States |
| NASM | National Air and Space Museum | United States |
| NASS | National Agricultural Statistics Service | United States |
| NBII | National Biological Information Infrastructure | United States |
| NBL | New Brunswick Laboratory | United States |
| NCC | National Coordinating Center for Telecommunications | United States |
| NCCAM | National Center for Complementary and Alternative Medicine | United States |
| NCCDPHP | National Center for Chronic Disease Prevention and Health Promotion | United States |
| NCCIC | National Child Care Information Center | United States |
| NCD | National Council on Disability | United States |
| NCDC | National Climatic Data Center | United States |
| NCEH | National Center for Environmental Health | United States |
| NCES | National Center for Education Statistics | United States |
| NCHS | National Center for Health Statistics | United States |
| NCHSTP | National Center for HIV, STD, and TB Prevention | United States |
| NCI | National Cancer Institute | United States |
| NCID | National Center for Infectious Diseases | United States |
| NCIPC | National Center for Injury Prevention and Control | United States |
| NCIS | Naval Criminal Investigative Service | United States |
| NCJRS | National Criminal Justice Reference Service | United States |
| NCLIS | National Commission on Libraries and Information Science | United States |
| NCPC | National Capital Planning Commission | United States |
| NCRR | National Center for Research Resources | United States |
| NCS | National Communications System | United States |
| NCTR | National Center for Toxicological Research | United States |
| NCUA | National Credit Union Administration | United States |
| NCVHS | National Committee on Vital and Health Statistics | United States |
| NDIC | National Drug Intelligence Center | United States |
| NDU | National Defense University | United State |
| NEA | National Endowment for the Arts | United States |
| NEC | National Economic Council | United States |
| NEGP | National Education Goals Panel (defunct) | United States |
| NEH | National Endowment for the Humanities | United States |
| NEI | National Eye Institute | United States |
| NEIC | National Earthquake Information Center | United States |
| NERSC | National Energy Research Scientific Computing Center | United States |
| NESDIS | National Environmental Satellite, Data, and Information Service | United States |
| NETL | National Energy Technology Laboratory | United States |
| NFA | National Fire Academy | United States |
| NGA | National Gallery of Art | United States |
| NGDC | National Geophysical Data Center | United States |
| NGO | Non-governmental organisation | United Kingdom |
| NGS | National Geospatial Intelligence School | United States |
| NHI | National Highway Institute | United States |
| NHIC | National Health Information Center | United States |
| NHLBI | National Heart, Lung and Blood Institute | United States |
| NHPRC | National Historical Publications and Records Commission | United States |
| NHS | National Health Service | United Kingdom |
| NHTSA | National Highway Traffic Safety Administration | United States |
| NIA | National Institute on Aging | United States |
| NIAAA | National Institute on Alcohol Abuse and Alcoholism | United States |
| NIAID | National Institute of Allergy and Infectious Diseases | United States |
| NIAMS | National Institute of Arthritis and Musculoskeletal and Skin Diseases | United States |
| NIC | National Institute of Corrections | United States |
| NICHD | National Institute of Child Health and Human Development | United States |
| NICS | Northern Ireland Civil Service | United Kingdom |
| NIDCD | National Institute on Deafness and Other Communication Disorders | United States |
| NIDCR | National Institute of Dental and Craniofacial Research | United States |
| NIDDK | National Institute of Diabetes and Digestive and Kidney Disease | United States |
| NIDRR | National Institute on Disability and Rehabilitation Research | United States |
| NIEHS | National Institute of Environmental Health Sciences | United States |
| NIFC | National Interagency Fire Center | United States |
| NIFL | National Institute for Literacy | United States |
| NIGC | National Indian Gaming Commission | United States |
| NIGMS | National Institute of General Medical Sciences | United States |
| NIH | National Institutes of Health | United States |
| NIJ | National Institute of Justice | United States |
| NIMA | National Imagery and Mapping Agency | United States |
| NIMH | National Institute of Mental Health | United States |
| NINDS | National Institute of Neurological Disorders and Stroke | United States |
| NINR | National Institute of Nursing Research | United States |
| NIO | Northern Ireland Office | United Kingdom |
| NIOSH | National Institute for Occupational Safety and Health | United States |
| NIPA | National Income and Product Accounts | United States |
| NIST | National Institute of Standards and Technology | United States |
| NISTIR | National Institute of Standards and Technology Interagency Report | United States |
| NLE | National Library of Education | United States |
| NLRB | National Labor Relations Board | United States |
| NMB | National Mediation Board | United States |
| NMFS | National Marine Fisheries Service | United States |
| NNSA | National Nuclear Security Administration | United States |
| NOAA | National Oceanic and Atmospheric Administration | United States |
| NODC | #rowspan#National Oceanographic Data Center | United States |
| NOS | National Ocean Service | United States |
| NPCR | National Program of Cancer Registries | United States |
| NPOESS | National Polar-orbiting Operational Environmental Satellite System | United States |
| NPS | National Park Service | United States |
| NPTO | National Petroleum Technology Office | United States |
| NR | National Register of Historic Places | United States |
| NRC | Nuclear Regulatory Commission | United States |
| NRCS | Natural Resources Conservation Service | United States |
| NRDP | National Rural Development Partnership | United States |
| NREN | National Research and Education Network | United States |
| NREVSS | National Respiratory and Enteric Virus Surveillance System | United States |
| NRL | Naval Research Laboratory | United States |
| NRO | National Reconnaissance Office | United States |
| NRPC | National Railroad Passenger Corporation | United States |
| NS&I | United States Statutes at Large | United Kingdom |
| NSA | National Security Agency | United States |
| NSC | National Security Council | United States |
| NSF | National Science Foundation | United States |
| NSTL | National Space Technology Laboratories | United States |
| NTIA | National Telecommunications and Information Administration | United States |
| NTIS | National Technical Information Service | United States |
| NTP | National Toxicology Program | United States |
| NTSB | National Transportation Safety Board | United States |
| NVSS | National Vital Statistics System | United States |
| NWC | National War College | United States |
| NWCG | National Wildfire Coordinating Group | United States |
| NWS | National Weather Service | United States |
| NWTRB | Nuclear Waste Technical Review Board | United States |
| OA | OA Office of Administration | United States |
| OAC | Office of Antiboycott Compliance | United States |
| OACU | Office of Animal Care and Use | United States |
| OAIT | Office of American Indian Trust | United States |
| OALJ | Office of Administrative Law Judges | United States |
| OAR | Office of AIDS Research; Office of Oceanic and Atmospheric Research | United States |
| OAS | Organization of American States | United State |
| OASDI | Old-Age and Survivors Insurance and Disability Insurance | United States |
| OAT | Office for the Advancement of Telehealth | United States |
| OBI | Office of Business Innovations | United States |
| OBL | Office of Business Liaison | United States |
| OBR | Office for Budget Responsibility | United Kingdom |
| OCC | Comptroller of the Currency | United States |
| OCD | Office of Community Development | United States |
| OCE | Office of the Chief Economist | United States |
| OCR | Office for Civil Rights | United States |
| OCRWM | Office of Civilian Radioactive Waste Management | United States |
| OCS | Office of Community Services | United States |
| OCSE | Office of Child Support Enforcement | United States |
| ODEP | Office of Disability Employment Policy | United States |
| ODP | Office of Disease Prevention | United States |
| ODPM | Office of the Deputy Prime Minister | United Kingdom |
| OECA | Office of Enforcement and Compliance Assurance | United States |
| OECD | Organization for Economic Cooperation and Development | United States |
| OEGT | Office of Electronic Government and Technology | United States |
| OELA | Office of English Language Acquisition | United States |
| OERI | Office of Educational Research and Improvement | United States |
| OES | Bureau of Oceans and International Environmental and Scientific Affairs | United States |
| OESE | Office of Elementary and Secondary Education | United States |
| OFA | Office of Family Assistance | United States |
| OFAC | Office of Foreign Assets Control | United States |
| OFCCP | Office of Federal Contract Compliance Programs | United States |
| OFHEO | Office of Federal Housing Enterprise Oversight | United States |
| OFM | Office of Financial Management | United States |
| OFR | Office of the Federal Register | United States |
| OGE | Office of Government Ethics | United States |
| OGP | Office of Government wide Policy | United States |
| OGWDW | Office of Ground Water and Drinking Water | United States |
| OHASIS | Office of Health and Safety Information System | United States |
| OHRP | Office for Human Research Protections | United States |
| OIG | Office of the Inspector General (USA) | United States |
| OIIA | Office of Intergovernmental and Interagency Affairs | United States |
| OJJDP | Office of Juvenile Justice and Delinquency Prevention | United States |
| OJP | Office of Justice Programs | United States |
| OLAW | Office of Laboratory Animal Welfare | United States |
| OLMS | Office of Labor Management Standards | United States |
| OMAO | Office of Marine and Aviation Operations | United States |
| OMAR | Office of Medical Applications of Research | United States |
| OMAR | Office of Medical Applications of Research | United States |
| OMH | Office of Minority Health | United States |
| OMHAR | Office of Multifamily Housing Assistance Restructuring | United States |
| OMM | Offshore Minerals Management Program | United States |
| ONDCP | Office of National Drug Control Poliy | United States |
| ONR | Office of Naval Research | United States |
| ONS | Office for National Statistics | United Kingdom |
| OPA | Office of Population Affairs | United States |
| OPE | Office of Postsecondary Education | United States |
| OPEC | Organization of Petroleum Exporting Countries | United States |
| OPHS | Office of Public Health and Science Office of Public Health and Science | United States |
| OPIC | Overseas Private Investment Corporation | United States |
| OPM | Office of Personnel Management | United States |
| OPPTS | Office of Prevention, Pesticides, and Toxic Substances | United States |
| ORA | Office of Research and Applications | United States |
| ORACBA | Office of Risk Assessment and Cost-Benefit Analysis | United States |
| ORD | Office of Rare Diseases | United States |
| ORHP | Office of Rural Health Policy | United States |
| ORI | Office of Research Integrity | United States |
| ORMH | Office of Research on Minority Health | United States |
| ORNL | Oak Ridge National Laboratory | United States |
| ORR | Office of Refugee Resettlement | United States |
| ORWH | Office of Research on Women's Health | United States |
| OSAC | Overseas Security Advisory Council | United States |
| OSBP | Office of Small Business Office of Small Business Programs | United States |
| OSC | Office of Special Counsel | United States |
| OSCAR | Online System for Central Accounting Reporting | United Kingdom |
| OSCE | Office of Child Support Enforcement | United States |
| OSDBU | Office of Small and Disadvantaged Business Utilization | United States |
| OSERS | Office of Special Education and Rehabilitative Services | United States |
| OSF | Office of Space Flight | United States |
| OSHA | Occupational Safety and Health Administration | United States |
| OSHRC | Occupational Safety and Health Review Commission | United States |
| OSM | Office of Surface Mining; Office of Spectrum Management | United States |
| OST | Office of Science and Technology; Office of the Secretary of Transportation | United States |
| OSTI | Office of Scientific and Technical Information | United States |
| OSTP | Office of Science and Technology Policy | United States |
| OSWER | Office of Solid Waste and Emergency Response | United States |
| OTA | Office of Technology Assment | United States |
| OTJ | Office of Tribal Justice | United States |
| OTS | Office of Thrift Supervision | United States |
| OTT | Office of Transportation Technologies | United States |
| OVAE | Office of Vocational and Adult Education | United States |
| OVC | Office for Victims of Crime | United States |
| OWBO | Office of Women's Business Ownership | United States |
| OWCP | Office of Workers' Compensation Programs | United States |
| OWH | Office on Women's Health | United States |
| PAC | Public Accounts Committee | United Kingdom |
| PAHO | Pan American Health Organization | United States |
| PAM | Office of Acquisition and Property Management | United States |
| PASC | Public Administration Select Committee | United Kingdom |
| PBGC | Pension Benefit Guaranty Corporation | United States |
| PBS | Public Buildings Service | United States |
| PC | Peace Corps | United States |
| PCBE | President's Council on Bioethics | United States |
| PCC | Panama Canal Commission | United States |
| PCIE | President's Council on Integrity and Efficiency | United States |
| PESA | Public Expenditure Statistical Analyses | United Kingdom |
| PFIAB | President's Foreign Intelligence Advisory Board | United States |
| PHA | Public Housing Agency | United States |
| PHN | Center for Population, Health and Nutrition | United States |
| PHPPO | Public Health Practice Program Office | United States |
| PHPS | Public Health Prevention Service | United States |
| PHS | Public Health Service | United States |
| PHTN | Public Health Training Network | United States |
| PIH | Office of Public and Indian Housing | United States |
| PLLI | National Institute on Post secondary Education, Libraries, and Lifelong Learning | United States |
| PM | Prime Minister | United Kingdom |
| PNNL | Pacific Northwest National Laboratory | United States |
| POW/MP | Prisoner of War/Missing Personnel | United States |
| PPQ | Plant Protection and Quarantine | United States |
| PRC | Postal Rate Commission | United States |
| PRM | Bureau of Population, Refugees, and Migration | United States |
| PSC | Program Support Center | United States |
| PSE | Public Sector Employment (ONS dataset) | United Kingdom |
| PTO | Patent and Tradmark Office | United States |
| PUMS | Public Use Microdata Samples | United States |
| PWBA | Pension and Welfare Benefits Administration | United States |
| Q (Q1 etc.) | Quarter | United Kingdom |
| QDS | Quarterly Data Summary | United Kingdom |
| RA | Reserve Affairs | United States |
| RAG | Red – Amber – Green | United Kingdom |
| RAME | Resource Departmental Expenditure Limit | United Kingdom |
| RBS | Rural Business-Cooperative Service | United States |
| RD | Rural Development | United States |
| RDEL | Resource Departmental Expenditure Limit | United Kingdom |
| REE | Research, Education and Economics | United States |
| REIS | Regional Economic Information System (Searchable REIS) | United States |
| RHS | Rural Housinervice | United States |
| RICHS | Rural Information Center Health Service | United States |
| RMA | Risk Management Agency | United States |
| ROTC | Reserve Officer Training Corps | United States |
| RRB | Railroad Retirement Board | United States |
| RSA | Rehabilitation Services Administration | United States |
| RSPA | Research and Special Programs Administration | United States |
| RUS | Rural Utilities Service | United States |
| SAMHSA | Substance Abuse and Mental Health Services Administration | United States |
| SAVE | Systematic Alien Verification for Entitlement | United States |
| SBA | Small Business Administration | United States |
| Scot | Scotland Office | United Kingdom |
| SCS | Senior Civil Service | United Kingdom |
| SDFS | #rowspan#Safe and Drug-Free Schools | United States |
| SDWIS | Safe Drinking Water Information System | United States |
| SEC | Securities and Exchange Commission; Space Environment Center | United States |
| SEDAC | Socioeconomic Data and Applications Center | United States |
| SEER | #rowspan#Surveillance, Epidemiology, and End Results | United States |
| SEO/HEO | Senior Executive Officer/Higher Executive Officer (civil service grade) | United Kingdom |
| SERC | Smithsonian Environmental Research Center | United States |
| SG | Scottish Government | United Kingdom |
| SGLI | Service Members' Group Life Insurance | United States |
| SI | Smithsonian Institute | United States |
| SIC | Standard Industrial Classification | United States |
| SIES | Office of Strategic Industries Economic Security | United States |
| SITES | Smithsonian Institution Traveling Exhibition Service | United States |
| SJI | State Justice Institute | United States |
| SLAC | Stanford Linear Accelerator Center | United States |
| SLSDC | Saint Lawrence Seaway Development Corporation | United States |
| SNL | Savannah River Site | United States |
| SR | Spending Review/Spending Round | United Kingdom |
| SRP | Structural Reform Plan | United Kingdom |
| SRS | Savannah River Site | United States |
| SS | Secret Service | United States |
| SSA | Social Security Administration | United States |
| SSI | Supplemental Security Income Program | United States |
| SSS | Selective Service System | United States |
| START | Selective Service System | United States |
| Stat. | United States Statutes at Large | United States |
| STB | Surface Transportation Board | United States |
| STI | Scientific and Technical Information | United States |
| TA | Technology Administration | United States |
| TAA | Trade Adjustment Assistance | United States |
| TANF | Temporary Assistance for Needy Families | United States |
| TASC | Transportation Administrative Service Center | United States |
| TDA | Trade and Development Agency | United States |
| TFF | Treasury Forfeiture Fund | United States |
| TIC | Trade Information Center | United States |
| TIPS | Terrorism Information and Prevention System | United States |
| TME | Total Managed Expenditure | United Kingdom |
| TSA | Transportation Security Administration | United States |
| TSI | Transportation Security Administration | United States |
| TSO | TRICARE Support Office | United States |
| TSP | Thrift Savings Plan | United States |
| TVA | Tennessee Valley Authority | United States |
| UKREP | United Kingdom Permanent Representation to the European Union | United Kingdom |
| VA | Department of Veterans Affairs | United States |
| VBA | Veterans' Employment and Training Service | United States |
| VBA | Violence Against Women Office | United States |
| VETS | Veterans' Employment and Training Service | United States |
| VGLI | Veterans' Group Life Insurance | United States |
| VHA | Veterans Health Administration | United States |
| VISTA | Volunteers in Service to AmericaDepartment for Education and Skills | United States |
| VOA | Voice of America | United States |
| Wal | Wales Office | United Kingdom |
| WAPA | Western AreaAdministration | United States |
| WB | Waterways Experiment Station | United States |
| WG | Welsh Government | United Kingdom |
| WGA | Whole of Government Accounts | United Kingdom |
| WHMO | White House Military Office | United States |
| WHO | World Health Organization | United States |
| WIC | Women, Infants and Children, supplemental food program for | United States |
| WMI | Workforce Management Information | United Kingdom |
| WNET | Women's Network for Entrepreneurial Training | United States |
| WTO | Word Trade Organisation | United States |
| WSMR | White Sands Missile Range | United States |
| ZIP (Code) | Zone Improvement Plan | United States |