LibGuides: GovSpeak: A Guide to U.S. Government Acronyms & Abbreviations: N

N3C	National COVID Cohort Collaborative (older link archive)
NAAL	National Assessment of Adult Literacy
NAALC	North American Agreement on Labor Cooperation (older link archive)
NAAMDRC	North American Aquatic Macroinvertebrate Digital Reference Collection
NAAMES	North Atlantic Aerosols and Marine Ecosystems Study (older link archive)
NAAMP	North American Amphibian Monitoring Program (older link archive; archive2)
NAAP	Native American Affairs Program
NAAQS	National Ambient Air Quality Standards (older link archive)
NABat	North American Bat Monitoring Program (older link archive)
NABDI	Native American Business Development Institute grant
NABEC	Native American Business Enterprise Center (unable to verify 3/19)
NABMRR	National Advisory Board on Medical Rehabilitation Research (older link archive)
NAC	NASA Advisory Council (older link archive) \| National Advisory Committee, Census \| National Advisory Committee, EPA \| National Agroforestry Center (older link archive; archive2) \| National Audiovisual Center (unable to verify 2/22)
NACCD	National Advisory Committee on Children and Disasters (older link archive)
NACCH	National Assessment of Coastal Change Hazards (older link archive; archive2; archive3; archive4; archive5)
NACD	Native American Consultation Database (discontinued 2/18)

NACEM	North American Climate Extremes Monitoring (unable to verify 6/21)
NACEPT	National Advisory Council for Environmental Policy and Technology (unable to verify 12/19)
NACHHD	National Advisory Child Health and Human Development Council (older link archive)
NACIC	National Counterintelligence Center (merged into ONCIX, then into NCSC)
NACIDD	National Advisory Committee on Individuals with Disabilities and Disasters
NACIE	National Advisory Council on Indian Education \| National Advisory Council on Innovation and Entrepreneurship (older link archive)
NACIQI	National Advisory Committee on Institutional Quality and Integrity
NACMH	National Advisory Council on Migrant Health (older link archive)
NACO	Name Authority Cooperative Program
NACOSH	National Advisory Committee on Occupational Safety & Health (older link archive)
NACS	National Agricultural Classification Survey \| Nuclear and Chemical Sciences Division (older link archive)
NACSD	National Advisory Committee on Seniors and Disasters (older link archive)
NACTEP	Native American-Career and Technical Education Program
NAD	National Address Database (older link archive; archive2) \| National Appeals Division (older link archive)
NADC	National Animal Disease Center
NADL	Native American Direct Loan
NADM	North American Drought Monitor (older link archive)
NADP	National Atmospheric Deposition Program
NADRC	National Alzheimer’s and Dementia Resource Center
NADS	National Advanced Driving Simulator
NAEFS	North American Ensemble Forecast System
NAEP	National Assessment of Educational Progress
NAETC	Native American Employment and Training Council (older link archive; archive2)
NAFDS	National Agriculture and Food Defense Strategy (older link archive; archive2; archive3)
NAFRI	National Advanced Fire and Resource Institute

NAFTA	North American Free Trade Agreement (older link archive; archive2)
NAGB	National Assessment Governing Board
NAGP	National Animal Germplasm Program (older link archive)
NAGPRA	National Native American Graves Protection and Repatriation Act (older link archive)
NAHLN	National Animal Health Laboratory Network (older link archive)
NAHMS	National Animal Health Monitoring System
NAHRS	National Animal Health Reporting System
NAI	NASA Astrobiology Institute (unable to verify 10/20)
NAIAC	National AI Advisory Committee
NAICS	North American Industry Classification System (older link archive)
NAII	National Artificial Intelligence Institute
NAIP	National Adult Immunization Plan \| National Agriculture Imagery Program (older link archive)
NAIRRTF	National AI Research Resource Task Force (older link archive)
NAL	National Agricultural Library (older link archive) \| Native American Language program
NAL@ED	Native American Language Grant
NALDC	National Agricultural Library Digital Collections (older link archive; archive2)
NALO	National Applications Liaison Office
NALRC	Native American Language Resource Center
NAM	North American Mesoscale
NAMCS	National Ambulatory Medical Care Survey (older link archive)
NaMES	National Marine Ecosystem Status
NAMRS	National Adult Maltreatment Reporting System
NAMSS	National Archive of Marine Seismic Surveys
NamUs	National Missing and Unidentified Persons System (older link archive)
NANC	North American Numbering Council
NAO	National Applications Office (defunct) \| North Atlantic Oscillation (older link archive)
NAP	National Action Plan for Open Government \| National Action Plan to Combat Human Trafficking \| Noninsured Crop Disaster Assistance Program
NAPAP	National Acid Precipitation Assessment Program (unable to verify 8/18)
NAPCS	North American Product Classification System (older link archive)
NAPHS	National Action Plan for Health Security
NAPMP	National Advanced Packaging Manufacturing Program
NAQFC	National Air Quality Forecast Capability
NAQI	National Air Quality Initiative (older link archive)

NARA	National Archives and Records Administration
NAREL	National Analytical Radiation Environmental Laboratory
NARI	NASA Aeronautics Research Institute (older link archive)
NARIP	National Instant Criminal Background Check System (NICS) Act Record Improvement Program
NARMS	National Antimicrobial Resistance Monitoring System for Enteric Bacteria (older link archive)
NARP	National Agriculture Release Program
NARR	North American Regional Reanalysis (older link archive)
NARS	National Aquatic Resource Surveys
NAS	Nonindigenous Aquatic Species
NASA	National Aeronautics and Space Administration
NASCTN	National Advanced Spectrum and Communications Test Network
NASIS	National Soil Information System (older link archive) \| Native American Student Information System
NASM	National Air and Space Museum
NASNTI	Native American-Serving Nontribal Institutions Program
NASS	National Agricultural Statistics Service \| National Assisted Reproductive Technology Surveillance System \| National Automotive Sampling System (older link archive ) \| Nationwide Ambulatory Surgery Sample
NASS GES	National Automotive Sampling System General Estimates System
NASS-PHS	Integrated Assessment Subsystem-Public Housing Assessment System
NATA	National Air Toxics Assessment
NATCARB	National Carbon Sequestration Database and Geographic Information System (older link archive)
National DPP	National Diabetes Prevention Program
NATO	North Atlantic Treaty Organisation (older link archive)
NATRS	National Adenovirus Type Reporting System
NatSec Cyber	National Security Cyber Section
NATTS	National Air Toxics Trends Stations
NATTT	North America Tapestry of Time and Terrain
NAVCEN	Navigation Center
NAWQA	National Water-Quality Assessment Program (older link archive; archive2)
NAWQA NLC	National Water-Quality Assessment Program National Liaison Committee
NAWS	National Agricultural Workers Survey (older link archive; archive2)
NBAC	National Bioethics Advisory Commission (replaced by PCBE, then PCSBI)
NBACC	National Biodefense Analysis and Countermeasures Center
NBAF	National Bio and Agro-Defense Facility (older link archive)
NBAM	National Broadband Availability Map

NBB	Nutritional Biomarkers Branch
NBC	National Benefits Center \| National Business Center (changed to IBC)
NBCCEDP	National Breast and Cervical Cancer Early Detection Program
NBCS	Navajo Birth Cohort Study
NBCUS	National Blood Collection and Utilization Survey
NBD-PWG	NIST Big Data Public Working Group (older link archive)
NBEL	National Biomass Estimator Library
NBEOC	National Business Emergency Operations Center
NBFAC	National Bioforensic Analysis Center (merged into NBACC)
NBHQF	National Behavioral Health Quality Framework (unable to verify 3/19; older link archive)
NBI	National Bridge Inventory
NBIB	National Background Investigations Bureau (merged into DCSA)
NBIC	National Biosurveillance Integration Center (content archived 12/17)
NBII	National Biological Information Infrastructure (defunct as of 1/12)
NBIS	National Bridge Inspection Standards
NBISC	NASA Biological Institutional Scientific Collection
NBL	New Brunswick Laboratory Program Office (older link archive; archive2)
NBM	National Broadband Map (discontinued 12/18; older link archive; replaced by Fixed Broadband Deployment map)
NBO	NOAA Budget Office (older link archive; archive2)
NBP	National Biomonitoring Program
NBPI	Northern Border Prosecution Initiative (unable to verify 5/18)
NBR	National Bison Range (older link archive)
NBRC	Northern Border Regional Commission
NBS	National Beneficiary Survey \| National Electronic Disease Surveillance System Base System
NBSB	National Biodefense Science Board (changed to NPRSB; reverted back to NBSB; older link archive)
NBSDB	National Building Stone Database (unable to verify 11/22)
NBTCC	National Biological Threat Characterization Center (merged into NBACC)
NBTS	New Beginning for Tribal Students (older link archive)

NCA	National Cemetery Administration \| National Climate Assessment (older link archive)
NCA4	Fourth National Climate Assessment
NCA5	Fifth National Climate Assessment (older link archive; archive2)
NCACA	National Capital Arts and Cultural Affairs
NCADAC	National Climate Assessment & Development Advisory Committee (older link archive)
NCAE-C	National Centers of Academic Excellence in Cybersecurity
NCAH	National Centers for Animal Health
NCAI	NOAA Center for Artificial Intelligence (older link archive)
NCANDS	National Child Abuse and Neglect Data System
NCAP	New Car Assessment Program (older link archive) \| Notification of Construction Contract Award Portal
NCAR	National Center for Atmospheric Research (older link archive; archive2)
NCASC	National Climate Adaptation Science Center (older link archive; archive2; archive3; archive4)
NCASE	National Center on Afterschool and Summer Enrichment (older link archive)
NCATC	National Criminal Analysis and Targeting Center
NCATS	National Center for Advancing Translational Sciences
NCAUR	National Center for Agricultural Utilization Research
NCAVC	National Center for the Analysis of Violent Crime (unable to verify 8/22)
NCBA	Nationwide Communications Baseline Assessment
NCBC	National Counterproliferation and Biosecurity Center
NCBDDD	National Center on Birth Defects and Developmental Disabilities (older link archive)

NCBI	National Center for Biotechnology Information
NCC	National Combined Councils \| National Computer Center \| National Coordinating Center for Communications (older link archive)
NCCA	National Coastal Condition Assessment
NCCAD	National Counter-Improvised Explosive Device (IED) Capabilities Analysis Database (unable to verify 6/23; older link archive; archive2)
NCCAM	National Center for Complementary and Alternative Medicine (changed to NCCIH)
NC CASC	North Central Climate Adaptation Science Center (older link archive; archive2; archive3)
NCCC	National Civilian Community Corps (older link archive; archive2; archive3)
NCCCP	National Comprehensive Cancer Control Program
NCCDPHP	National Center for Chronic Disease Prevention and Health Promotion (older link archive)
NCCI	National Correct Coding Initiative (older link archive; archive2; archive3; archive4)
NCCIC	National Child Care Information and Technical Assistance Center (defunct as of 8/11) \| National Cybersecurity and Communications Integration Center (unable to verify 6/19; possibly changed to CISA Central)
NCCIES	National Climate Change Interpretation and Education Strategy
NCCIH	National Center for Complementary and Integrative Health
NCCOE	National Cybersecurity Center of Excellence
NCCOS	National Centers for Coastal Ocean Science
NCCR	National Childhood Cancer Registry \| National Coastal Condition Reports
NCCS	National Center for Computational Sciences (changed to OLCF)
NC CSC	North Central Climate Science Center (changed to NC CASC)
NCCT	National Center for Computational Toxicology (changed to CCTE)
NCCV	National Climate Change Viewer (older link archive; archive2; archive3)

NCCWSC	National Climate Change and Wildlife Science Center (changed to NCASC)
NCD	National Council on Disability \| Noncommunicable Diseases
NCDC	National Climatic Data Center (merged into NCEI)
NCDDC	National Coastal Data Development Center (merged into NCEI)
NCDF	National Center for Disaster Fraud
NCDRST	NIOSH Center for Direct Reading and Sensor Technologies
NCDS	National Center for Data Services
NCEA	National Center for Environmental Assessment (unable to verify 12/19) \| National Center on Elder Abuse (older link archive)
NCEAI	National Council for Expanding American Innovation (changed to CI2)
NCEC	National Climate Extremes Committee (older link archive)
NCECDTL	National Center on Early Childhood Development, Teaching, and Learning
NCECR	John S. McCain III National Center for Environmental Conflict Resolution
NCEE	National Center for Education Evaluation and Regional Assistance \| National Center for Environmental Economics
NCEF	National Cryo-Electron Microscopy Facility
NCEH	National Center for Environmental Health
NCEHC	National Center for Ethics in Health Care
NCEI	National Centers for Environmental Information
NCELA	National Clearinghouse for English Language Acquisition
NCEM	National Center for Electron Microscopy (older link archive)
NCEP	National Centers for Environmental Prediction (older link archive) \| National Cholesterol Education Program (unable to verify 10/14)
NCEPCR	National Center for Excellence in Primary Care Research
NCER	National Center for Education Research \| National Center for Environmental Research (unable to verify 12/19)
NCERC	National Criticality Experiments Research Center (older link archive)

NCES	National Center for Education Statistics
NCET	National Cryptocurrency Enforcement Team
NCETR	National Center for Explosives Training and Research (older link archive; archive2)
NCEZID	National Center for Emerging and Zoonotic Infectious Diseases
NCF	National Critical Function (older link archive)
NCFI	National Computer Forensics Institute (older link archive)
NCFO	National Census of Ferry Operators (older link archive; archive2)
NCFS	National Commission on Forensic Science (defunct; older link archive)
NCFTA	National Firearms Commerce and Trafficking Assessment
NCFY	National Clearinghouse on Families & Youth (changed to NCHYF; older link archive)
NCGMP	National Cooperative Geologic Mapping Program (older link archive; archive2)
NCHBHS	National Center on Health, Behavioral Health, and Safety
NCHE	National Center for Homeless Education
NCHHSTP	National Center for HIV, Viral Hepatitis, STD, and TB Prevention (changed from National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention)
NCHIP	National Criminal History Improvement Program (older link archive)
NCHM	National Center for Health Marketing (changed to Health Communication and Social Marketing)
NCHS	National Center for Health Statistics
NCHSTP	National Center for HIV, STD, and TB Prevention (changed to NCHHSTP)
NCHWA	National Center for Health Workforce Analysis (older link archive; archive2)
NCHYF	National Clearinghouse on Homeless Youth and Families

NCI	National Cancer Institute \| National Compliance Initiative (changed to NECI)
NCIC	National Crime Information Center (older link archive)
NCID	National Center for Infectious Diseases (defunct; absorbed by NCHHSTP, NCIRD, NCPDCID, and NCZVED) \| National Court Interpreter Database
NCIJTF	National Cyber Investigative Joint Task Force
NCIPC	National Center for Injury Prevention and Control (older link archive)
NCIRA	NCPS Cloud Interface Reference Architecture
NCIRC	National Criminal Intelligence Resource Center (older link archive)
NCIRD	National Center for Immunization and Respiratory Diseases
NCIRP	National Cyber Incident Response Plan (older link archive)
NCITE	National Counterterrorism Innovation, Technology, and Education Center
NCITSPSD	National Center for Information and Technical Support for Postsecondary Students with Disabilities
NCIX	Office of the National Counterintelligence Executive (merged with NCSC)
NCJRS	National Criminal Justice Reference Service (older link archive)
NCJS	National Center for Judicial Security (older link archive)
NCL	Nanotechnology Characterization Laboratory
NCLB	No Child Left Behind
NClimDiv	NOAA Monthly U.S. Climate Divisional Database
NCLIS	National Commission on Libraries and Information Science (defunct as of 3/08)
NCLR	National Clandestine Laboratory Register
NCMAS	National Commission on Military Aviation Safety (unable to verify 10/21)
NCMHD	National Center on Minority Health and Health Disparities (changed to NIMHD)
NCMRR	National Center for Medical Rehabilitation Research
NCMVS	NIOSH Center for Motor Vehicle Safety (changed to CMVS)
NCN	NOAA Continuously Operating Reference Stations Network
NCNR	NIST Center for Neutron Research (older link archive)
NCO	NCEP Central Operations
NCOA	National Change of Address
NCOD	National Contaminant Occurrence Database (older link archive; archive2)
NCORP	NCI Community Oncology Research Program

NCP	National Center for Health Promotion & Disease Prevention \| National Continuity Programs \| National Oil & Hazardous Substances Pollution Contingency Plan
NCPAW	National Center for Productive Aging and Work
NCPC	National Capital Planning Commission \| National Counterproliferation Center (changed to NCBC; older link archive)
NCPDCID	National Center for Preparedness, Detection, and Control of Infectious Diseases (merged into NCEZID)
NCPFCE	National Center on Parent, Family, and Community Engagement
NCPHI	National Center for Public Health Informatics (changed to PHITPO, then PHSIPO)
NCPPCC	National Crime Prevention and Privacy Compact Council (older link archive; archive2)
NCPS	National Center for Patient Safety \| National Cybersecurity Protection System (older link archive)
NCPTSD	National Center for Posttraumatic Stress Disorder (changed to PTSD)
NCPTT	National Center for Preservation Technology and Training (older link archive)
NCPV	National Center for Photovoltaics
NCPW	National Consumer Protection Week (older link archive)
NCR	National Capital Region
NCRA	NCI Council of Research Advocates
NCRAR	National Center for Rehabilitative Auditory Research
NCRC	National Climate-Computing Research Center \| Office of National Capital Region Coordination (older link archive; archive2)
NCRDS	National Coal Resources Data System (older link archive; archive2; archive3; archive4)
NCRFO	National Center for Radiation Field Operations
NCRL	NOAA Central and Regional Libraries
NCRMP	National Coral Reef Monitoring Program
NCRN	NSF-Census Research Network
NCRP	National Corrections Reporting Program (older link archive)
NCRPIS	North Central Regional Plant Introduction Station

NCRR	National Center for Research Resources (defunct; see org. history)
NCRTM	National Clearinghouse of Rehabilitation Training Materials
NCS	National Children's Study (older link archive) \| National Clandestine Service (unable to verify 1/21) \| National Communications System (changed to OEC) \| National Compensation Survey (older link archive)
NCSA	National Center for Statistics and Analysis (older link archive; archive2; archive3) \| National Collection Service Areas
NCSC	National Counterintelligence and Security Center (older link archive)
NCSD	National Cyber Security Division (unable to verify 12/13)
NCSER	National Center for Space Exploration Research (defunct) \| National Center for Special Education Research
NCSES	National Center for Science and Engineering Statistics (older link archive)
NCSIA	National Center on Subsidy Innovation and Accountability (older link archive)
NCSMMN	National Coordinated Soil Moisture Monitoring Network
NCSS	National Computer Security Survey \| National Concussion Surveillance System \| National Cooperative Soil Survey (older link archive)
NCSSLE	National Center on Safe Supportive Learning Environments
NCST	National Construction Safety Team
NCSWIC	National Council of Statewide Interoperability Coordinators
NCS-X	National Crime Statistics Exchange (older link archive)
NCTC	National Conservation Training Center (older link archive) \| National Counterterrorism Center (older link archive)
NCTECD	National Center on Tribal Early Childhood Development (changed to Tribal Child Care Capacity Building Center; older link archive)
NCTIC	National Center for Trauma-Informed Care (unable to verify 3/19)
NCTR	National Center for Toxicological Research (older link archive) \| NOAA Center for Tsunami Research
NCTSI	National Child Traumatic Stress Initiative
NCUA	National Credit Union Administration
NCVAS	National Center for Veterans Analysis and Statistics
NCVHS	National Committee on Vital and Health Statistics
NCVRW	National Crime Victims' Rights Week (older link archive)
NCVS	National Crime Victimization Survey (older link archive)
NCVSP	National Census of Victim Service Providers
NCWCP	NOAA Center for Weather & Climate Prediction
NCWES	National Cyber Workforce and Education Strategy
NCZVED	National Center for Zoonotic, Vector-Borne, and Enteric Diseases (merged into NCEZID)
NDA	National Institute of Mental Health Data Archive

NDACC	Network for the Detection of Atmospheric Composition Change
NDAR	National Database for Autism Research (merged into NDA)
N-DASH	NCVS Dashboard
NDAWN	NIDIS Drought and Wildland Fire Nexus
NDB	NIH Data Book
NDBC	National Data Buoy Center
NDC	National Declassification Center \| National Drug Code Directory (older link archive)
NDCD	Nanoscale Device Characterization Division
NDCP	National Database of Childcare Prices (older link archive)
NDDS	Narcotic and Dangerous Drug Section
NDE	NAEP Data Explorer
NDEP	National Diabetes Education Program (ceased 2019; older link archive; archive2) \| National Digital Elevation Program (unable to verify 9/16)
NDEWS	National Drug Early Warning System (older link archive; archive2)
N-DEx	Law Enforcement National Data Exchange (older link archive)
NDF	Office of the Nonproliferation and Disarmament Fund (older link archive; archive2)
NDFD	National Digital Forecast Database (older link archive; archive2; archive3)
NDI	National Death Index \| National Digital Initiatives
NDIC	National Drug Intelligence Center (defunct as of 6/12)

NDIIPP	National Digital Information Infrastructure and Preservation Program
NDL	Nutrient Data Laboratory (changed to MAFCL; older link archive; archive 2)
NDLP	National Digital Library Program
NDMS	National Disaster Medical System (older link archive)
NDNH	National Directory of New Hires
NDNP	National Digital Newspaper Program
NDOP	National Digital Orthoimagery Program (unable to verify 9/16)
NDPC	National Domestic Preparedness Consortium
NDR	National Driver Register
NDRC	National Disaster Resilience Competition
NDRF	National Disaster Recovery Framework (older link archive)
NDRP	National Drought Resilience Partnership
NDRPD	National Disaster Recovery Program Database (unable to verify 5/15)
NDS	National Defense Strategy (2018; 2005, 2008) \| National Detention Standards
NDSA	National Digital Stewardship Alliance (transitioned to non-governmental ndsa.org)
NDSS	National Diabetes Surveillance System (changed to USDSS)
NDSTS	National Defense Science and Technology Strategy
NDW	National Data Warehouse (older link archive)
NDWAC	National Drinking Water Advisory Council
NDWP	Native Diabetes Wellness Program

NE	Nuclear Engineering Division \| Office of Nuclear Energy
NEA	Bureau of Near Eastern Affairs (older link archive) \| National Endowment for the Arts
NEAC	Nuclear Energy Advisory Committee (older link archive)
NEAP	National Enrollee Assignment Plan
NEARS	National Environmental Assessment Reporting System
NEB	Nutritional Epidemiology Branch (changed to MEB)
NEC	National Economic Council (older link archive; archive2) \| National Evaluation Center
NE CASC	Northeast Climate Adaptation Science Center (older link archive; archive2; archive3)
NECI	National Enforcement and Compliance Initiatives (older link archive; archive2)
NECP	National Emergency Communications Plan (older link archive; archive2; archive3)
NE CSC	Northeast Climate Science Center (changed to NE CASC)
NED	NIH Enterprise Directory
NEDM	National Education Data Model (unable to verify 9/16)
NEDSS	National Electronic Disease Surveillance System (older link archive)
NEEAC	National Environmental Education Advisory Council (older link archive)
NEEDS	National Electric Energy Data System (older link archive; archive2)
NEEMO	NASA Extreme Environment Mission Operations (older link archive)
NEESPI	Northern Eurasia Earth Science Partnership Initiative (older link archive)
NEET	Nuclear Energy Enabling Technologies
NEETP	National Environmental Education and Training Program
NEFOP	Northeast Fisheries Observer Program (older link archive)

NEFSC	Northeast Fisheries Science Center (older link archive)
NEGP	National Education Goals Panel (defunct; UNT has archived some material)
NEH	National Endowment for the Humanities
NEHHOR	Northeast Home Heating Oil Reserve
NEHRP	National Earthquake Hazards Reduction Program
NEHRS	National Electronic Health Records Survey
NEI	National Emissions Inventory \| National Export Initiative (unable to verify 1/20; older link archive) \| National Eye Institute
NEIC	National Earthquake Information Center (older link archive; archive2) \| National Enforcement Investigations Center
NEISS	National Electronic Injury Surveillance System (older link archive)
NEJAC	National Environmental Justice Advisory Council
NEL	Nutrition Evidence Library (changed to NESR; older link archive)
NEMESIS	National Exotic Marine and Estuarine Species Information System
NEMI	National Environmental Methods Index
NEMS	National Energy Modeling System
NEMSAC	National EMS Advisory Council (older link archive)
NEMSIS	National Emergency Medical Services Information System
NEO	Near-Earth Object Program (defunct as of 4/17; see CNEOS)
NEON	National Ecological Observatory Network \| National Expansion of Employment Opportunities Network
NEOWISE	Near-Earth Objects Wide-field Infrared Survey Explorer (older link archive)
NEP	National Estuary Program \| National Exercise Program
NEPA	National Environmental Policy Act
NEPAG	NASA Electronic Parts Assurance Group
NEPHTN	National Environmental Public Health Tracking Network (older link archive)
NEPIS	National Environmental Publications Information System (merged into NSCEP)
NEPP	NASA Electronic Parts and Packaging

NEQsys	Northeast Quantum Systems Center
NERDE	National Economic Resilience Data Explorer
NERFC	Northeast River Forecast Center
NERI	National Estuaries Restoration Inventory (unable to verify 2/18)
NERL	National Exposure Research Laboratory (unable to verify 12/19)
NERRS	National Estuarine Research Reserve System
NERSC	National Energy Research Scientific Computing Center
NES	National Export Strategy \| Nonemployer Statistics
NESARC-III	National Epidemiologic Survey on Alcohol and Related Conditions-III
NESC	NASA Engineering and Safety Center (older link archive)
NESD	Nonemployer Statistics by Demographics
NESDIS	National Environmental Satellite, Data, and Information Service
NESDOCS	NESDIS Directives Online Collaboration System (changed to NESDIS Policies, Procedures, and Plans; older link archive)
NESHAP	National Emission Standards for Hazardous Air Pollutants
NESR	Nutrition Evidence Systematic Review
NESS	National Enterovirus Surveillance System \| Office of Nuclear Energy, Safety and Security (older link archive; archive2)
NEST	Nuclear Emergency Support Team
NET	New Electronic Titles
NETCCN	National Emergency Tele Critical Care Network (changed to NETN)
NETF	National Explosives Task Force
NETI	National Enforcement Training Institute
NETL	National Energy Technology Laboratory
NETN	National Emergency Telemedicine Network
NETP	National Educational Technology Plan
NETWG	Nuclear Energy Tribal Working Group
NEUP	Nuclear Energy University Programs
NEVI	National Electric Vehicle Infrastructure Formula Program
NEW	Native Employment Works
New ERA	Empowering Rural America program
NEW VISTAS	Neighborhood Enrichment with Vision Involving Services, Treatment, and Supervision (older link archive; archive2)
NEWIS	NOAA Extreme Weather Information Sheets (discontinued 5/23; older link archive; archive2)
NEWS	National Experimental Wellbeing Statistics
NEX	NASA Earth Exchange (older link archive; archive2)
NEXRAD	Next Generation Weather Radar (older link archive)
NExT	NCI Experimental Therapeutics Program

NFA	National Fire Academy (older link archive) \| Non-Federal Audit Program
NFAN	NOAA Federated Aerosol Network
NFC	National Finance Center
NFCSP	National Family Caregiver Support Program (older link archive)
NFCTA	National Firearms in Commerce and Trafficking Assessment
NFD	National Fossil Day (older link archive)
NFDSC	National Fire Decision Support Center
NFES	National Forum on Education Statistics
NFF	National Fingerprint File (older link archive; archive2)
NFGEL	National Forest Genetics Laboratory (older link archive)
NFHL	National Flood Hazard Layer (older link archive; archive2; archive3)
NFHP	National Fish Habitat Partnership (older link archive)
NFHS	National Fish Hatchery System (older link archive)
NFIP	National Flood Insurance Program (older link archive)
NFIRS	National Fire Incident Reporting System (older link archive)
NFJP	National Farmworker Jobs Program (older link archive)
NFLIS	National Forensic Laboratory Information System (older link archive; archive2)
NFLSS	National Fluids Lease Sale System (older link archive)
NFO	Nevada Field Office (older link archive)
NFOP	National Fugitive Operations Program (older link archive)
NFPORS	National Fire Plan Operations and Reporting System
NFPP	National Fish Passage Program (older link archive; archive2)
NFPS	National Former Prisoner Survey
NFR	National Firefighter Registry for Cancer
NFS	National Forest System
NFSL	National Forest Service Library
NFSP	National Freight Strategic Plan
NFSR	National Fish Strain Registry
NFTTU	National Firearms and Tactical Training Unit (changed to OFTP)

NFWPCAS	National Fish, Wildlife, and Plants Climate Adaptation Strategy (older link archive)
NGA	National Gallery of Art
NGAC	National Geospatial Advisory Committee
NGC	National Gang Center (older link archive) \| National Genomics Center for Wildlife and Fish Conservation \| National Guideline Clearinghouse (discontinued 7/18; see GAM)
NGCE	National Geospatial Center of Excellence (unable to verify 10/22)
NGDA	National Geospatial Data Asset
NGDC	National Geophysical Data Center (merged into NCEI)
NGEE Arctic	Next-Generation Ecoexperiments Arctic
NGEE Tropics	Next-Generation Excoexperiments Tropics (older link archive)
NGFR	Next Generation First Responder
NGGDPP	National Geological and Geophysical Data Preservation Program (older link archive; archive2)
NGGS	Next Generation Grants System
NGI	Next Generation Identification (older link archive; archive2)
NGIC	National Gang Intelligence Center (older link archive)
NGMDB	National Geologic Map Database
NGN PS	Next Generation Networks Priority Services (unable to verify 2/23)
NGP	National Geospatial Program (older link archive; archive2)
NGR	National Gang Report (older link archive)
NGRAC	National Genetic Resources Advisory Council (older link archive)
NGRL	National Germplasm Resources Laboratory (older link archive)
NGRP	National Genetic Resources Program
NGS	National Geodetic Survey
NGSR	Northeast Gasoline Supply Reserve
NGTOC	National Geospatial Technical Operations Center (older link archive; archive2)
NGU	National Gang Unit (older link archive)
NGWMN	National Ground-Water Monitoring Network
NGWOS	Next Generation Water Observing System
NGWU	Natural Gas Weekly Update
NHA	National Heritage Area

NHAMCS	National Hospital Ambulatory Medical Care Survey (older link archive)
NHANES	National Health and Nutrition Examination Survey (older link archive)
NHAS	National HIV/AIDS Strategy (older link archive; archive2; archive3)
NHBS	National HIV Behavioral Surveillance
NHC	National Hunger Clearinghouse (unable to verify 6/19) \| National Hurricane Center
NHCBP	National Historic Covered Bridge Preservation Program
NHCCI	National Highway Construction Cost Index
NHCS	National Hospital Care Survey (older link archive)
NHD	National Hydrography Dataset (older link archive; archive2)
NHDAP	National Homeless Data Analysis Project
NHDP	National Hansen's Disease Program (older link archive; archive2)
NHDPlus	National Hydrography Dataset Plus
NHDR	National Healthcare Disparities Report
NHDS	National Hospital Discharge Survey (older link archive)
NHEERL	National Health and Environmental Effects Research Laboratory (unable to verify 12/19)
NHES	National Household Education Surveys
NHFP	National Highway Freight Program
NHGF	National Hydrologic Geospatial Fabric
NHGRI	National Human Genome Research Institute
NHHBG	Native Hawaiian Housing Block Grant Program (older link archive)
NHHCS	National Home and Hospice Care Survey (older link archive)
NHI	National Highway Institute
NHIC	National Health Information Center (older link archive; archive2)
NHIN	Nationwide Health Information Network (changed to NwHIN)
NHIS	National Health Interview Survey (older link archive)

NHL	National Historic Landmarks Program (older link archive)
NHLBI	National Heart, Lung and Blood Institute
NHLS	National Housing Locator System (unable to verify 2/13)
NHM&E	National HIV Prevention Program Monitoring and Evaluation
NHPC	National HIV Prevention Conference
NHPI NHIS	Native Hawaiian and Pacific Islander National Health Interview Survey
NHPP	National Healthcare Preparedness Programs Branch \| National Highway Performance Program
NHPRC	National Historical Publications and Records Commission
NHQDR	National Healthcare Quality and Disparities Reports (older link archive)
NHQI	Nursing Home Quality Initiative (older link archive; archive2; archive3)
NHQR	National Healthcare Quality Report
NHS	National Household Survey (older link archive)
NHSC	National Health Service Corps

NHSN	National Healthcare Safety Network
NHSR	National Health Statistics Reports
NHSRC	National Homeland Security Research Center (unable to verify 12/19)
NHSS	National HIV Surveillance System \| Natural Hazards Support System (replaced by IGEMS)
NHTS	National Household Travel Survey
NHTSA	National Highway Traffic Safety Administration
NHTTAC	National Human Trafficking Training and Technical Assistance Center
NHWP	National Healthy Worksite Program (changed to WHP)
NIA	National Institute on Aging
NIAAA	National Institute on Alcohol Abuse and Alcoholism
NIAC	NASA Innovative Advanced Concepts Program (older link archive) \| National Infrastructure Advisory Council (older link archive; archive2)
NIACS	Northern Institute of Applied Climate Science (older link archive; archive2)
NIAID	National Institute of Allergy and Infectious Diseases
NIAMS	National Institute of Arthritis and Musculoskeletal and Skin Diseases
NIBI	National Index of Borehole Information
NIBIB	National Institute of Biomedical Imaging and Bioengineering
NIBIN	National Integrated Ballistic Information Network
NIBRS	National Incident-Based Reporting System (older link archive; archive2; archive3)

NIC	National Ice Center (changed to USNIC; older link archive) \| National Information Center (older link archive) \| National Institute of Corrections \| National Intelligence Council (older link archive; archive2; archive3; archive4)
NICC	National Interagency Coordination Center
NICE	National Initiative for Cybersecurity Education (older link archive)
NICEATM	NTP Interagency Center for the Evaluation of Alternative Toxicological Methods (older link archive; archive2)
NICHD	National Institute of Child Health and Human Development
NICHSR	National Information Center on Health Services Research and Health Care Technology (older link archive)
NICS	National Instant Criminal Background Check System (older link archive; archive2)
NID	National Inventory of Dams
NIDA	National Institute on Drug Abuse (older link archive)
NIDB	NIH Intramural Database
NIDC	National Isotope Development Center (older link archive)
NIDCD	National Institute on Deafness and Other Communication Disorders
NIDCR	National Institute of Dental and Craniofacial Research
NIDDK	National Institute of Diabetes and Digestive and Kidney Disease
NIDILRR	National Institute on Disability, Independent Living, and Rehabilitation Research (older link archive; archive2)
NIDIS	National Integrated Drought Information System (older link archive)
NIDRR	National Institute on Disability and Rehabilitation Research (changed to NIDILRR)
NIEHS	National Institute of Environmental Health Sciences
NIEM	National Information Exchange Model
NIES	National Indian Education Study
NIF	National Ignition Facility
NIFA	National Institute of Food and Agriculture
NIFC	National Interagency Fire Center
NIFL	National Institute for Literacy (defunct; some content continued in LINCS)
NIFSI	National Integrated Food Safety Initiative (older link archive)
NIFTT	National Interagency Fuels, Fire, and Vegetation Technology Transfer (absorbed into WFMRDA FFE 02/14)

NIGC	National Indian Gaming Commission
NIGMS	National Institute of General Medical Sciences
NIH	National Institutes of Health
NIHHIS	National Integrated Heat Health Information System (older link archive; archive2)
NIIC	National Incident Information Center (absorbed into NIFC)
NIICD	National Interagency Incident Communications Division (older link archive)
NIJ	National Institute of Justice (older link archive)
NIMAC	National Inventory and Monitoring Applications Center (unable to verify 4/23; older link archive)
NIMH	National Institute of Mental Health
NIMHD	National Institute on Minority Health and Health Disparities
NIMM	National Inventory of Marine Mammals
NIMO	National Incident Management Organization
NIMS	National Incident Management System (older link archive)
NINDS	National Institute of Neurological Disorders and Stroke
NINR	National Institute of Nursing Research
NIOCCS	NIOSH Industry and Occupation Computerized Coding System (older link archive; archive2)
NIOGEMS	National Indian Oil & Gas Evaluation & Management System (older link archive; archive2)
NIOSH	National Institute for Occupational Safety and Health
NIP	National Immunization Program (changed 6/07 to Vaccines and Immunizations)
NIPA	National Income and Product Accounts (older link archive; archive2)
NIPC	National Infrastructure Protection Center (merged with IAIP)
NIPF	National Intelligence Priorities Framework
NIPFTC	National Interagency Prescribed Fire Training Center

NIPP	National Infrastructure Protection Plan (unable to verify 2/23; older link archive; archive2)
NIPRB	Notice of Illegal Pirate Radio Operation
NIRSQ	National Institute for Research on Safety and Quality (unable to verify 12/21)
NIS	National Identification Services (unable to verify; likely absorbed by PPQ) \| National Immunization Survey (older link archive) \| National Incidence Study \| National Inmate Survey \| National (Nationwide) Inpatient Sample
NISAR	NASA-ISRO SAR Mission
NISC	National Invasive Species Council
NISIC	National Invasive Species Information Center (older link archive)
NISIMS	National Invasive Species Information Management System (retired 4/19; replaced by VMAP)
NISP	National Industrial Security Program
NISPPAC	National Industrial Security Program Policy Advisory Committee
NIST	National Institute of Standards and Technology
NIST ARC	NIST Alternatives for Resilient Communities
NISTIR	National Institute of Standards and Technology Interagency Report (older link archive)
NISVS	National Intimate Partner and Sexual Violence Survey (older link archive)
NITAAC	NIH Information Technology Acquisition and Assessment Center
NITAM	National Insider Threat Awareness Month
NITRD	Networking and Information Technology Research and Development
NITTF	National Insider Threat Task Force (older link archive)
NITT-TA	Now Is The Time Technical Assistance Center (unable to verify 3/19)
NIWQP	National Irrigation Water Quality Program (unable to verify 8/17)
NJCDA	National Juvenile Court Data Archive
NJRP	National Judicial Reporting Program
NJTTF	National Joint Terrorism Task Force
NKSIP	North Korean Serials Databases
NKUDIC	National Kidney and Urologic Diseases Information Clearinghouse (unable to verify 5/15)
NLA	National Lakes Assessment
NLAE	National Laboratory for Agriculture and the Environment
NLAPH	National Leadership Academy for the Public’s Health (unable to verify 9/23)
NLB	Native Lifestyle Balance

NLCD	National Land Cover Database
NLDAS	North American Land Data Assimilation System
NLE	National Library of Education \| National Library of Energy (discontinued; older link archive)
NLG	National Leadership Grants for Libraries (changed to NLG-L)
NLG-L	National Leadership Grants for Libraries
NLI	National Land Imaging Program (older link archive; archive2)
NLIC	National Lead Information Center
NLLAP	National Lead Laboratory Accreditation Program
NLM	National Library of Medicine
NLMC	National Labor-Management Conference
NLMS	National Longitudinal Mortality Study (older link archive)
NLOT	National Fire Line Officers Team
NLRB	National Labor Relations Board
NLRC	National Legal Resource Center (discontinued)
NLS	National Library Service for the Blind and Physically Handicapped \| National Longitudinal Surveys
NLSCYA	National Longitudinal Survey of Youth 1979 Child and Young Adult
NLSI	NASA Lunar Science Institute (changed to SSERVI)
NLSM	National Longitudinal Survey of Older and Young Men
NLSP	NASA Life Science Portal
NLSW	National Longitudinal Survey of Mature and Young Women
NLSY	National Longitudinal Survey of Youth
NLTS2	National Longitudinal Transition Study-2
NMAfA	National Museum of African Art
NMAI	National Museum of the American Indian (older link archive)
NMAM	NIOSH Manual of Analytical Methods
NMAO	NOAA Marine and Aviation Operations (changed to OMAO)
NMB	National Mediation Board (older link archive)
NMDB	National Mortgage Database
NMED	Nuclear Material Events Database
NMFN	National Multimodal Freight Network
NMFS	National Marine Fisheries Service (older link archive) \| National Mortality Followback Survey
NMHSS	National Mental Health Services Survey (older link archive; archive2)
NMHSUPL	National Mental Health and Substance Use Policy Laboratory

NMI	NNDSS Modernization Initiative (unable to verify 6/21)
NMIC	National Minerals Information Center (older link archive)
NMIHS	National Maternal and Infant Health Survey
NMIO	National Maritime Intelligence-Integration Office (older link archive)
NMMR	National Mine Map Repository (older link archive)
NMMSS	Nuclear Materials Management & Safeguards System (older link archive)
NMNH	National Museum of Natural History
NMO	New Mexico Operations (older link archive)
NMP	National Mesonet Program
NMREC	National Maritime Resource and Education Center (unable to verify 7/20; older link archive)
NMS	National Museum Survey
NMTC	New Market Tax Credit Program
NMVTIS	National Motor Vehicle Title Information System (older link archive)
NN	National Network \| Public Housing Neighborhood Networks Program (older link archive)
NNAS	National Nursing Assistant Survey (older link archive)
NNCO	National Nanotechnology Coordination Office
NNCP	National Name Check Program (older link archive; archive2)
NNCSS	National Neurological Conditions Surveillance System (older link archive)
NNDSS	National Notifiable Diseases Surveillance System (older link archive)
NNF	National Needs Graduate and Postgraduate Fellowship Grants Program (older link archive; archive2; archive3)
NNHS	National Nursing Home Survey (older link archive)
NNI	National Nanotechnology Initiative \| Native Nations Institute for Leadership, Management, and Policy
NNL	National Natural Landmarks Program
NN/LM	National Network of Libraries of Medicine
NNMI	National Network for Manufacturing Innovation (older link archive)
NNPP	Naval Nuclear Propulsion Program (older link archive)
NNRRC	National and Nuclear Risk Reduction Center (older link archive)
NNSA	National Nuclear Security Administration (older link archive)
NNSS	Nevada National Security Site

NOAA	National Oceanic and Atmospheric Administration
NOAA ENC	NOAA Electronic Navigational Charts (older link archive)
NOAAGlobalTemp	NOAA Merged Land Ocean Global Surface Temperature Analysis (older link archive; archive2)
NOB	Neuro-Oncology Branch
NOC	National Ocean Council (defunct or inactive 1/17, WH transition) \| National Operations Center (older link archive)
NOC-DRS	National Operations Center Division of Resource Services (absorbed by NOC)
NODC	National Oceanographic Data Center (merged into NCEI)
NODD	NOAA Open Data Dissemination
NOHRSC	National Operational Hydrologic Remote Sensing Center
NOHSS	National Oral Health Surveillance System (older link archive)
NOIRS	National Occupational Injury Research Symposium
NOMADS	National Operational Model Archive and Distribution System (older link archive; archive2)
NOMEC	National Strategy for Ocean Mapping, Exploration, and Characterization Council (older link archive; archive2; archive3)
NOMS	National Occupational Mortality Surveillance
NOP	National Observer Program (older link archive) \| National OPSEC Program (certificate error) \| National Organic Program
NOPP	National Oceanographic Partnership Program
NOPREN	Nutrition and Obesity Policy Research and Evaluation Network (older link archive)
NOPUS	National Occupant Protection Use Surveys
NORA	National Occupational Research Agenda (older link archive)
NORMS	National Occupational Respiratory Mortality System (unable to verify 5/20)
NOROCK	Northern Rocky Mountain Science Center
NORS	National Outbreak Reporting System \| Network Outage Reporting System
NOS	National Ocean Service
NOSA	NOAA Observing System Architecture (unable to verify 1/22; older link archive)
NOSC	NOAA Observing Systems Council
NOTAM	Notice to Air Missions
NOTC	National Offshore Training Center (older link archive)
NOTP	National Offshore Training Program (older link archive)

NP	Office of Nuclear Physics (older link archive)
NPAC	Office of Nonproliferation and Arms Control (older link archive; archive2; archive3)
NPALS	National Post-acute and Long-term Care Study
NPARL	Northern Plains Agricultural Research Laboratory
NPB	National Payroll Branch (changed to PSB)
NPC	National Processing Center
NPCR	National Program of Cancer Registries
NPD	National Preparedness Directorate (unable to verify 10/17)
NPDB	National Practitioner Data Bank
NPDES	National Pollutant Discharge Elimination System
NPDRS	National Plant Disease Recovery System (older link archive)
NPDT	National Plant Data Team (older link archive)
NPDWR	National Primary Drinking Water Regulations (older link archive)
N-PEARS	National Program Evaluation and Reporting System
NPEC	National Postsecondary Education Cooperative
NPG	National Portrait Gallery \| NIOSH Pocket Guide to Chemical Hazards
NPGS	National Plant Germplasm System (older link archive)
NPHI	National Public Health Institutes
NPHII	National Public Health Improvement Initiative
NPHPS	National Public Health Performance Standards
NPI	National Provider Identifier (older link archive; archive2; archive3)
NPIC	National Preparedness and Incident Coordination
NPIN	National Prevention Information Network
NPIPS	Networks, Processors, and Issuers Payments Surveys
NPIRS	National Patient Information Reporting System

NPL	National Priorities List
NPMS	National Pipeline Mapping System
NPOESS	National Polar-orbiting Operational Environmental Satellite System (replaced by JPSS)
NPP	Nuclear & Particle Physics Directorate
NPPD	National Protection and Programs Directorate (changed to CISA; older link archive)
NPPLAP	National Plant Protection Laboratory Accreditation Program
NPPSD	North Pacific Pelagic Seabird Database (older link archive; archive2)
NPPTL	National Personal Protective Technology Laboratory
NPR	National Partnership for Reinventing Government (archived at UNT) \| Naval Petroleum Reserves
NPRA	National Program Retrospective Assessment \| Nonprofit Research Activities Survey (older link archive)
NPRC	National Personnel Records Center
NPREC	National Prison Rape Elimination Commission (unable to verify 2/18)
NPREP	National Preparedness for Response Exercise Program (older link archive)
NPRM	Notice of Proposed Rulemaking
NPRP	National Pretrial Reporting Program (relaunched 2021; previously changed to SCPS)
NPRSB	National Preparedness and Response Science Board (changed back to NBSB)
NPS	National Pain Strategy (older link archive; archive2) \| National Park Service \| National Participants Survey (unable to verify 4/22) \| National Prisoner Statistics Program (older link archive) \| Nonpoint source pollution
NPS-8	National Prisoner Statistics program
NPSAB	National Park System Advisory Board
NPSAS	National Postsecondary Student Aid Study
NPSL	NASA Parts Selection List
NPSS	National Partnership for Student Success
NPTEC	Nonproliferation Test and Evaluation Complex (older link archive)
NPTO	National Petroleum Technology Office (unable to verify 1/08; likely absorbed into SCNGO)
NPWC	National Prevailing Wage Center (older link archive; archive2)
NPWRC	Northern Prairie Wildlife Research Center (older link archive; archive2)

NQCO	National Quantum Coordination Office
NQI	National Quantum Initiative
NQIAC	National Quantum Initiative Advisory Committee (older link archive)
NQMC	National Quality Measures Clearinghouse (discontinued 7/18; see GAM)
NQRP	National Qualified Representative Program
NQS	National Quality Strategy (site archived 5/23; older link archive)
NR	National Register of Historic Places (older link archive)
NRA	Natural Resources Analysis Group
NRAB	National Railroad Adjustment Board
NRB	Neuroimaging Research Branch (older link archive; archive2)
NRC	National Records Center (older link archive) \| National Revenue Center (older link archive) \| Neighborhood Reinvestment Corporation (changed to NeighborWorks America; older link archive) \| Nuclear Regulatory Commission
NRCA	National Risk and Capability Assessment (older link archive)
NRCC	National Response Coordination Center (unable to verify 3/22)
NRCS	Natural Resources Conservation Service (older link archive)
NRD	National Resource Directory \| Nationwide Readmissions Database
NRDA	Natural Resource Damage Assessment and Restoration Program
NRDAR	Natural Resource Damage Assessment and Restoration Program
NRDP	National Rural Development Partnership

NREL	National Renewable Energy Laboratory
NREN	National Research and Education Network (unable to verify 7/16)
NREPP	National Registry of Evidence-based Programs and Practices (discontinued; older link archive; archive2)
NREVSS	National Respiratory and Enteric Virus Surveillance System
NRF	National Response Framework
NRFC	National Responsible Fatherhood Clearinghouse
NRFU	Nonresponse Followup Operation
NRGR	NIMH Repository & Genomics Resource
NRHEEC	National Report on Human Exposure to Environmental Chemicals
NRI	National Resources Inventory (older link archive) \| National Risk Index \| Nationwide Rivers Inventory (older link archive) \| Neighborhood Revitalization Initiative (unable to verify 12/19)
NRIC	Natural Resource Investment Center (unable to verify 8/17)
NRM	Natural Resource Manager
NRMC	National Risk Management Center (older link archive; archive2; archive3; archive4)
NRMRL	National Risk Management Research Laboratory (unable to verify 12/19)
NRNP	National Road Network Pilot Program
NRO	National Reconnaissance Office
NROC	Natural Resources Office of Communications
NRP	National Residue Program for Meat, Poultry, and Egg Products (older link archive; archive2)
NRPB	National Recording Preservation Board
NRPC	National Railroad Passenger Corporation (AMTRAK)
NRR	Office of Nuclear Reactor Regulation
NRRC	Nuclear Risk Reduction Center (changed to NNRRC)
NRRSS	National River Restoration Science Synthesis (defunct)
NRS	National Runaway Safeline \| Natural Resources & Science \| Natural Resources Section \| Northern Research Station (older link archive; archive2)
NRSA	National Rivers and Streams Assessment
NRSS	Natural Resource Stewardship and Science Directorate (older link archive) \| National Roadway Safety Strategy
NRT	NSF Research Traineeship (older link archive)

NSA	National Security Agency
NSAAB	National Security Agency Advisory Board (unable to verify 12/20)
NSA/CSS	National Security Agency/Central Security Service
NSABB	National Science Advisory Board for Biosecurity (older link archive; archive2)
NSAF	National Stolen Art File (older link archive)
NSAP	National Survey of Adoptive Parents
NSAR	National Strategy for the Arctic Region
NSARIP	Implementation Plan for the National Strategy for the Arctic Region
NSB	National Science Board \| National Security Branch (older link archive)
NSC	NASA Safety Center (older link archive) \| National Security Council (older link archive)
NSCAI	National Security Commission on Artificial Intelligence
NSCAW	National Survey of Child and Adolescent Well-Being (older link archive)
NScD	Neutron Sciences Directorate
NSCEP	National Service Center for Environmental Publications
NSCG	National Survey of College Graduates (older link archive)
NSCH	National Survey of Children's Health
NSCL	Nanoscale Synthesis and Characterization Laboratory (older link archive)
NS-CMIC List	Non-SDN Chinese Military-Industrial Complex Companies List (older link archive)
NSCPS	National School COVID-19 Prevention Study
NSCS	National Survey of Crime and Safety

NSD	National Security Division, DOJ \| National Security Division, ICE \| National Security Division, USDA
NSDI	National Spatial Data Infrastructure
NSDUH	National Survey on Drug Use and Health (older link archive)
NSE	Nuclear Science & Engineering Division
NSEB	National Security Education Board (older link archive)
NSECE	National Survey of Early Care and Education
NSEERS	National Security Entry-Exit Registration System
NSEP	National Security Education Program (older link archive)
NSERL	National Soil Erosion Research Laboratory
NSES	National Strategy for Electronics Stewardship
NSF	National Science Foundation
NSF-PAR	NSF Public Access Repository
NSFG	National Survey of Family Growth (older link archive)
NSFLTP	Nationally Significant Federal Lands and Tribal Projects Program
NSGO	National Sea Grant Office
NSGP	Nonprofit Security Grant Program
NSHAPC	National Survey of Homeless Assistance Providers and Clients
NSI	Nationwide Suspicious Activity Reporting Initiative (older link archive) \| Neighborhood Stabilization Initiative
NSIA	National Security and International Affairs Division (defunct or inactive 1/17, WH transition)
NSID	National Security Investigations Division (changed to NSD; older link archive)
NSIDC	National Snow and Ice Data Center Distributed Active Archive Center (older link archive; archive2)
NSIDS	National Survey Of Indigent Defense Systems
NSIP	National Streamflow Information Program (changed to FPS) \| Nutrition Services Incentive Program (unable to verify 3/18)
NSIR	National Security and Intelligence Research Team (unable to verify 5/23)
NS-ISA	Non-SDN Iranian Sanctions Act List (older link archive)
NSISS	National Strategy for Information Sharing and Safeguarding (unable to verify 2/18)
NSL	National Sedimentation Laboratory
N-SLCT	NASA Sea Level Change Team

NSLDS	National Student Loan Data System (unable to verify 2/20; likely merged into studentaid.gov)
NSLP	National School Lunch Program (older link archive)
NSLS-II	National Synchrotron Light Source II (older link archive)
NSLTCP	National Study of Long-Term Care Providers (changed to NPALS)
NSMBB	Newborn Screening and Molecular Biology Branch
NS-MBS List	Non-SDN Menu-Based Sanctions List (older link archive)
NSMO	National Survey of Mortgage Originations
NSMP	National Strong-Motion Project
NSMV	National Security Multi-Mission Vessels
NSNSD	Natural Sounds and Night Skies Division
NSOAAP	National Survey of OAA Participants (older link archive)
NSOPF	National Study of Postsecondary Faculty
NSOPR	National Sex Offender Public Registry (changed to NSOPW)
NSOPW	Dru Sjodin National Sex Offender Public Website
NSP	National Public Transportation Safety Plan \| National Security Programs \| National Survey of Prosecutors \| Neighborhood Stabilization Program
NSpC	National Space Council
NSPD	National Security Professional Development
NSPIRE	National Standards for the Physical Inspection of Real Estate
NSPIRES	NASA Solicitation and Proposal Integrated Review and Evaluation System
NS-PLC List	Non-SDN Palestinian Legislative Council List (older link archive)
NSPS	National Special Pathogen System
NSR	New Source Review
NSRC	Nanoscale Science Research Center
NSRCF	National Survey of Residential Care Facilities (older link archive)
NSRCG	National Survey of Recent College Graduates
NSRDB	National Solar Radiation Database
NSRE	National Survey on Recreation and the Environment (older link archive)
NSRL	NASA Space Radiation Laboratory \| National Software Reference Library

NSRS	National Spatial Reference System
NSS	National Security Science (older link archive) \| National Settlement Service \| National Shelter System
NSSATS	National Survey of Substance Abuse Treatment Services (older link archive; archive2)
NSSC	NASA Shared Services Center (older link archive; archive2) \| National Supply Service Center
NSSDCA	NASA Space Science Data Coordinated Archive
NSSE	National Special Security Events (older link archive)
NSSH	National Soil Survey Handbook
NSSL	National Severe Storms Laboratory
NSSP	National Syndromic Surveillance Program
NSSRN	National Sample Survey of Registered Nurses
NSST	Near-surface Sea Surface Temperature
NST	Nanoscience and Technology Division \| Nation-State Threat Center
NSTAC	National Security Telecommunications Advisory Committee (older link archive; archive2; archive3; archive4)
NSTC	National Science and Technology Center (changed to NOC) \| National Science and Technology Council (older link archive; archive2) \| National Semiconductor Technology Center
NSTCS	National Survey of Tribal Court Systems
NSTF	Natural Convection Shutdown Heat Removal Test Facility
NSTIC	National Strategy for Trusted Identities in Cyberspace (changed to TIG)
NSTS	National Source Tracking System
NSTTC	Office of National Security and Technology Transfer Controls (older link archive)
NSTX-U	National Spherical Torus eXperiment - Upgrade (older link archive)
NSU	National Security Unit (unable to verify 2/21)
NSUBS	National Survey of the Use of Booster Seats
NSWP	National Space Weather Program
NSYC	National Survey of Youth in Custody
NTA	National Taxpayer Advocate (changed to TAS) \| National Technical Assistance (older link archive) \| Non-Traditional Agent
NTAC	National Threat Assessment Center
NTACT	National Technical Assistance Center on Transition

NTAD	National Transportation Atlas Database (older link archive; archive2)
NTAE	New Technologies for Ag Extension Program (older link archive)
NTAS	National Terrorism Advisory System
NTBG	National Tribal Broadband Grant
NTBS	National Tribal Broadband Strategy
NTC	National Targeting Center (older link archive) \| National Tracing Center \| National Training Center (older link archive)
NTD	National Transit Database (older link archive) \| Neglected Tropical Diseases
NTDP	National Technology and Development Program (older link archive)
NTED	National Training and Education Division (older link archive; archive2)
NTER	National Threat Evaluation and Reporting (older link archive; archive2) \| National Training & Education Resource (unable to verify 10/22)
NTES	National Training and Education System (unable to verify 5/20; older link archive)
NTEWS	National Training, Education, and Workforce Survey (older link archive)
NTHMP	National Tsunami Hazard Mitigation Program
NTI	National Tunnel Inventory
NTIA	National Telecommunications and Information Administration
NTID	National Technical Institute for the Deaf (older link archive)
NTIS	National Technical Information Service
NTL	National Transportation Library (older link archive)

NTM	National Transit Map
NTNFC	National Technical Nuclear Forensics Center
NTNS	Nuclear Technologies and National Security directorate
NTP	National Toxicology Program \| National Transmission Planning Study (older link archive)
NTPS	National Teacher and Principal Survey
NTRC	Nanotechnology Research Center \| National Transportation Research Center (older link archive)
NTRL	National Technical Reports Library
NTRRP	National Transportation Response and Recovery Program
NTRS	NASA Technical Reports Server
NTS	Non-Traffic Surveillance
NTSB	National Transportation Safety Board (older link archive)
NTSIP	National Toxic Substance Incidents Program
NTSS	NASA Technical Standards System
NTTAC	National Training and Technical Assistance Center for Child, Youth and Family Mental Health
NTTO	National Travel and Tourism Office (older link archive)
NTTP	National Technical Training Program (older link archive)
NTWC	National Tribal Water Council (older link archive; archive2) \| National Tsunami Warning Center (older link archive)
NUCFAC	National Urban and Community Forestry Advisory Council
NUCMC	National Union Catalog of Manuscript Collections
NUOnet	Nutrient Use and Outcome Network database
NUPO	National Unmanned Aircraft Systems Program Office (changed to NUSO; older link archive)
NURP	National Undersea Research Program (merged with OE to create OER)
NUSO	National Uncrewed Systems Office
NuSTAR	Nuclear Spectroscopic Telescope Array (older link archive)
NUSTL	National Urban Security Technology Laboratory
NVAC	National Vaccine Advisory Committee (older link archive)

NVAP	National Veterinary Accreditation Program
NVBL	National Virtual Biotechnology Laboratory
NVC	National Vetting Center
NVCL	National Virtual Climate Laboratory
NVD	National Vulnerability Database
NVDB	NASA Vendor Database (older link archive; archive2)
NVDRS	National Violent Death Reporting System (older link archive)
NVEL	National Volume Estimator Library
NVEWS	National Volcano Early Warning System
NVFEL	National Vehicle and Fuel Emissions Laboratory
NVHAP	National Viral Hepatitis Action Plan (changed to Viral Hepatitis National Strategic Plan)
NVLAP	National Voluntary Laboratory Accreditation Program
NVMC	National Vessel Movement Center (older link archive)
NVP	National Vaccine Plan
NVPO	National Vaccine Program Office (older link archive; archive2)
NVSL	National Veterinary Services Laboratories
NVSN	New Vaccine Surveillance Network
NVSR	National Vital Statistics Reports
NVSS	National Vital Statistics System (older link archive)

NVTC	National Virtual Translation Center (older link archive)
NVWSC	Nevada Water Science Center
NWBC	National Women's Business Council
NWC	National Water Census (older link archive)
NWCA	National Wetland Condition Assessment
NW CASC	Northwest Climate Adaptation Science Center (older link archive; archive2; archive3)
NWCC	National Water and Climate Center (older link archive)
NWCG	National Wildfire Coordinating Group
NW CSC	Northwest Climate Science Center (changed to NW CASC)
NWD	National Water Dashboard \| No Wrong Door System
NWDP	National Wildlife Disease Program (older link archive)
NWFHS	National Wild Fish Health Survey (older link archive; archive2)
NWFHSDb	National Wild Fish Health Survey Database (discontinued 12/20, per email; older link archive)
NWFP	Northwest Forest Plan (older link archive; archive2)
NWFSC	Northwest Fisheries Science Center (older link archive)
NWGHAAD	National Women and Girls HIV/AIDS Awareness Day
NWHC	National Wildlife Health Center (older link archive)
NWHIC	National Women's Health Information Center
NwHIN	Nationwide Health Information Network (unable to verify 8/18; older link archive)

NWI	National Wetlands Inventory (older link archive)
NWIS	National Water Information System
NWLON	National Water Level Observation Network
NWMDE	Nonproliferation of Weapons of Mass Destruction Expertise (inactive or defunct 2/17)
NWOS	National Woodland Owner Survey (older link archive)
NWPG	National Water Program Guidance
NWPS	Nearshore Wave Prediction System
NWQI	National Water Quality Initiative
NWQL	National Water Quality Laboratory
NWQP	National Water Quality Program
NWRC	National Wetlands Research Center (changed to WARC) \| National Wildlife Research Center \| Northwest Watershed Research Center
NWRS	National Wildlife Refuge System (older link archive)
NWS	National Weather Service
NWSS	National Wastewater Surveillance System
NWTRB	Nuclear Waste Technical Review Board
NYCHVS	New York City Housing and Vacancy Survey
NYGS	National Youth Gang Survey (older link archive)
NYSS	National Youth Sports Strategy
NYTD	National Youth in Transition Database
NYTS	National Youth Tobacco Survey
NYWSC	New York Water Science Center
NZERTF	Net-Zero Energy Residential Test Facility