Alphabetical Listing of US Government Acronyms
- NDIC — National Drug Intelligence Center
- NDU — National Defense University
- NEA — National Endowment For The Arts
- NEC — National Economic Council
- NEGP — National Education Goals Panel (defunct)
- NEH — National Endowment For The Humanities
- NEI — National Eye Institute
- NEIC — National Earthquake Information Center
- NERSC — National Energy Research Scientific Computing Center
- NESDIS — National Environmental Satellite
- NETL — National Energy Technology Laboratory
- NFA — National Fire Academy
- NGA — National Gallery of Art; National Geospatial-Intelligence Agency
- NGDC — National Geophysical Data Center
- NGS — National Geospatial Intelligence School (reorganized Into DGS And SGST)
- NHGRI — National Human Genome Research Institute
- NHI — National Highway Institute
- NHIC — National Health Information Center
- NHLBI — National Heart
- NHPRC — National Historical Publications And Records Commission
- NHTSA — National Highway Traffic Safety Administration
- NIA — National Institute On Aging
- NIAAA — National Institute On Alcohol Abuse And Alcoholism
- NIAID — National Institute of Allergy And Infectious Diseases
- NIAMS — National Institute of Arthritis And Musculoskeletal And Skin Diseases
- NIC — National Institute of Corrections
- NICHD — National Institute of Child Health And Human Development
- NIDA — National Institute On Drug Abuse
- 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
- NIDRR — National Institute On Disability And Rehabilitation Research
- NIEHS — National Institute of Environmental Health Sciences
- NIFC — National Interagency Fire Center
- NIFL — National Institute For Literacy
- NIGC — National Indian Gaming Commission
- NIGMS — National Institute of General Medical Sciences
- NIH — National Institutes of Health
- NIJ — National Institute of Justice
- NIMA — National Imagery And Mapping Agency (replaced By NGA)
- NIMH — National Institute of Mental Health
- NINDS — National Institute of Neurological Disorders And Stroke
- NINR — National Institute of Nursing Research
- NIOSH — National Institute For Occupational Safety And Health
- NIPA — National Income And Product Accounts
- NIPC — National Infrastructure Protection Center
- NIST — National Institute of Standards And Technology
- NISTIR — National Institute of Standards And Technology Interagency Report
- NLE — National Library of Education
- NLM — National Library of Medicine
- NLRB — National Labor Relations Board
- NMB — National Mediation Board
- NMFS — National Marine Fisheries Service
- NNSA — National Nuclear Security Administration
- NOAA — National Oceanic And Atmospheric Administration
- NODC — National Oceanographic Data Center
- NOS — National Ocean Service
- NPCR — National Program of Cancer Registries
- NPOESS — National Polar-orbiting Operational Environmental Satellite System
- NPR — National Partnership For Reinventing Government (archived At Univ. of North Texas)
- NPS — National Park Service
- NPTO — National Petroleum Technology Office
- NR — National Register of Historic Places
- NRC — Nuclear Regulatory Commission
- NRCS — Natural Resources Conservation Service
- NRDP — National Rural Development Partnership
- NREN — National Research And Education Network
- NREVSS — National Respiratory And Enteric Virus Surveillance System
- NRL — Naval Research Laboratory
- NRO — National Reconnaissance Office
- NRPC — National Railroad Passenger Corporation (AMTRAK)
- NSA — National Security Agency
- NSC — National Security Council
- NSF — National Science Foundation
- NSTC — National Science And Technology Center
- NSTL — National Space Technology Laboratories
- NTIA — National Telecommunications And Information Administration
- NTIS — National Technical Information Service
- NTP — National Toxicology Program
- NTSB — National Transportation Safety Board
- NVSS — National Vital Statistics System
- NWC — National War College
- NWCG — National Wildfire Coordinating Group
- NWS — National Weather Service
- NWTRB — Nuclear Waste Technical Review Board
- OA — Office of Administration
- OAC — Office of Antiboycott Compliance
- OACU — Office of Animal Care And Use
- OAIT — Office of American Indian Trust
- OALJ — Office of Administrative Law Judges
- OAR — Office of AIDS Research; Office of Oceanic And Atmospheric Research
- OAS — Organization of American States
- OASDI — Old-Age And Survivors Insurance And Disability Insurance
- OAT — Office For The Advancement of Telehealth
- OBL — Office of Business Liaison
- OCC — Comptroller of The Currency
- OCD — Office of Community Development
- OCE — Office of The Chief Economist
- OCR — Office For Civil Rights (Dept. of Education)
- OCRWM — Office of Civilian Radioactive Waste Management