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

The most current, extensive and fully-linked listing of U.S. government office, program, resource, and other acronyms.

O

OA Office of Administration (defunct or inactive 1/17, WH transition)
OAA Office of Academic Affiliations
OAAG Office of the Associate Attorney General
OAAM Office of Audit, Assessment, and Management
OAA NP Older Americans Act Nutrition Program
OAC Office of Advanced Cyberinfrastructure | Office of Antiboycott Compliance
OACP Office of Aviation Consumer Protection
OACU Office of Animal Care and Use
OADMN Outbreak Analytics and Disease Modeling Network (changed to Insight Net)
OADPS Office of the Associate Director for Policy and Strategy, CDC (unable to verify 9/24)
OADR-ORWH Office of Autoimmune Disease Research-Office of Research on Women's Health
OADS Ocean Acidification Data Stewardship Project (merged into OCADS | Office of the Associate Director for Science (changed to OS)
OAE Office of Academic Engagement
OAG Office of the Attorney General
OAH Office of Adolescent Health (merged with OPA 6/19)
OAHMP Older Adult Home Modification Program
OAHP Office of Affordable Housing Preservation (changed to Recap)
OAI Office of Academic Improvement (unable to verify 9/24)
OAIT Office of American Indian Trust (defunct)
OAL Office of Administrative Litigation
OALJ Office of Administrative Law Judges, DOL  | Office of Administrative Law Judges, FERC
OAM Office of Administrative Management | Office of Advanced Manufacturing | Office of Air and Marine (changed to AMO) | Office of Archival Management (unable to verify 1/22)
OAMPO Office of Asset Management and Portfolio Oversight
OAO Office of Administrative Operations | Office of Advocacy and Outreach (unable to verify 3/20)
OAP Ocean Acidification Program | Office of Antimicrobial Products (changed to OID) | Office of Acquisition Policy | Office of Atmospheric Protection
OAQPS Office of Air Quality Planning and Standards
OAR Office of AIDS Research | Office of Air and Radiation | Office of Oceanic and Atmospheric Research
OARA Office of Agriculture and Rural Affairs
OARC Office of Autism Research Coordination (changed to ONAC)
OARM Office of Administration and Resources Management | Office of Attorney Recruitment and Management
OARS Office of Analysis and Research Services
OAS Office of Applied Studies (changed to CBHSQ) | Office of Appraisal Services (merged into AVSO) | Office of Aviation Services
OASAM Office of the Assistant Secretary for Administration and Management
OASB Office of the Advocate for Small Business Capital Formation
OASCR Office of the Assistant Secretary for Civil Rights
OASDI Old-Age and Survivors Insurance and Disability Insurance
OASG Office of the Associate Attorney General
OASH Office of the Assistant Secretary for Health
OASIS One Acquisition Solution for Integrated Services | Open Access Same-Time Information System
OASIS+ One Acquisition Solution for Integrated Services +
OAST Office of Accessible Systems & Technology (changed to CXD)
OAT Office for the Advancement of Telehealth | Organic Analytical Toxicology Branch
OATT Open Access Transmission Service Tariff
OAW Operation Allies Welcome (page archived 1/25)
OAWP Office of Accountability and Whistleblower Protection
OBA Office of Biotechnology Activities (unable to verify 7/17; likely changed to BBEBP)
OBBR Office of Biorepositories and Biospecimen Research
OB.DAAC Ocean Biology Distributed Active Archive Center
OBEMLA Office of Bilingual Education and Minority Languages Affairs (changed to OELA)
OBHE Office of Behavioral Health Equity
OBI Office of Business Informatics  | Office of Business Innovations (defunct)
OBIM Office of Biometric Identity Management
OBIMO Office of Bioresearch Monitoring Operations (changed to OBMI)
OBIS-USA Ocean Biodiversity Information System USA
OBL Office of Business Liaison (changed to OPE)
OBLR Office of Brownfields and Land Revitalization
OBMI Office of Bioresearch Monitoring Inspectorate
OBMT Office of Business Management and Transformation (changed to OOM)
OBO Bureau of Overseas Buildings Operations
OBOP GML Observatory Operations
OBP Office for Bombing Prevention  | Office of Biotechnology Products (renamed/reorganized into OPQA)
OBPA Office of Budget and Program Analysis
OBPG Ocean Biology Processing Group
OBPM Office of Budget and Performance Management
OBR Office of Building Renovation
OBRHI Office of Burden Reduction & Health Informatics
OBRR Office of Blood Research and Review
OBS Office of Broadcast Services (inactive or defunct 2/17) | Office of Observations
ObsIWG Integrated Observations Interagency Working Group
OBSSR Office of Behavioral and Social Sciences Research
OBTS Offender Based Transaction Statistics
OBTT Off-Base Transition Training
OC Office of Communications | Office of Compliance
OCA Office of Congressional Affairs, CIA (unable to verify 2/21)
OCADS Ocean Carbon and Acidification Data System
OCAHO Office of the Chief Administrative Hearing Officer
OCAP Ocean Climate Action Plan
OCAPPM Office of Customer Advocacy, Policy and Portfolio Management
OCB Office of Cuba Broadcasting
OCPD Oceans and Coastal Protection Division (unable to verify 7/17)
OCPP Office of Clinical Policy and Programs (unable to verify 10/24)
OCPR Office of Conflict Prevention and Resolution (changed to ADRO)
OCPS Office of Clinical and Preventive Services
OCQC Office of Compounding Quality and Compliance
OCR Office for Civil Rights, ED | Office for Civil Rights, HHS | Office for Civil Rights, OJP | Office of Civil Rights, EPA | Office of Community Revitalization | Office of Credit Ratings
OCRC Office of Civil Rights Compliance
OCRD Ocean Climate Research Division
OCRE Office of Civil Rights and Equal Employment Opportunity (unable to verify 1/25)
OCREOP Office for Civil Rights and Equal Opportunity Policy
OCRL Organic Chemistry Research Laboratory
OCRM Ocean and Coastal Resource Management (merged into OCM)
OCRPRO Office of Clinical Research Policy and Regulatory Operations
OCRS Organized Crime and Racketeering Section (merged into OCGS)
OCRWM Office of Civilian Radioactive Waste Management (unable to verify 10/22)
OCS Office of Cancer Survivorship | Office of Coast Survey | Office of Common Services | Office of Community Services | Office of Community Support | Office of Computational Science | Office of the Chief Scientist, NASA | Office of the Chief Scientist, USDA
OCSC Office of Citizen Services and Communications (changed to OCSIT)
OCSE Office of Child Support Enforcement (changed to OCSS)
OCSIRF Office of Chief Scientist, Integrated Research Facility
OCSIT Office of Citizen Services and Innovative Technologies (changed to TTS)
OCSPP Office of Chemical Safety and Pollution Prevention
OCSQ Office of Clinical Standards and Quality (changed to CCSQ)
OCSS Office of Child Support Services
OCT Office of the Chief Technologist
OCTAE Office of Career, Technical, and Adult Education
OCULAB Ocular Laboratory for Analysis of Biomarkers
OCWR Office of Congressional Workplace Rights
OCX GeoXO Ocean Color Instrument
OD Ocean Drilling (changed to ODP) | Office on Disability, HHS (merged into ACL)
OD2A Overdose Data to Action)
ODA Operational Data and Analytics Branch (unable to verify 4/24) | U.S. Official Development Assistance (replaced by FAE)
ODACMO Office of Diversity, Advisory Committee Management, and Outreach (unable to verify 12/18)
ODAG Office of the Deputy Attorney General
ODAPC Office of Drug and Alcohol Policy and Compliance
ODAR Office of Data, Analytics, and Research | Office of Disability Adjudication and Review
ODCR Office of Diversity and Civil Rights, ICE (changed to OCRC)
ODE Office of Data and Evaluation
ODE I Office of Drug Evaluation I (unable to verify 8/24)
ODE II Office of Drug Evaluation II (unable to verify 3/21)
ODE III Office of Drug Evaluation III (changed to OII)
ODE IV Office of Drug Evaluation IV (unable to verify 8/24)
ODEEO Office of Departmental Equal Employment Opportunity
ODEI Office for Diversity, Equity, and Inclusion (unable to verify 12/24; possibly replaced by OCREOP)
ODEP Office of Disability Employment Policy
ODES Office of Drug Evaluation Sciences
ODGMO Office of Departmental Grants Management and Oversight (changed to GMO)
ODH Office of Digital Humanities
ODHD Office of Diversity and Health Disparities (unable to verify 1/25)
OE Office of Economics | Office of Electricity (previously Office of Electricity Delivery and Energy Reliability) | Office of Enforcement | Office of Evaluation
OEA Office of Economic Adjustment (changed to OLDCC) | Office of Economics and Analytics | Office of Enforcement Analysis | Office of Environmental Analysis
OEC Office of Emergency Communications (changed to ECD)
OECA Office of Enforcement and Compliance Assurance
OECR Office of Emergency Care Research (unable to verify 2/18)
OECRC Office of External Civil Rights Compliance
OED Office of Economic Development | Office of Enrollment and Discipline
OEDCA Office of Employment Discrimination and Complaint Adjudication
OEDI Open Energy Data Initiative
OEE Office of Entrepreneurship Education | Office of Export Enforcement
OEEB Occupational and Environmental Epidemiology Branch
OEEO Office of Equal Employment Opportunity, CDC (changed to OEEOWE; reverted to OEEO 1/25)
OEEOWE Office of Equal Employment Opportunity and Workplace Equity, CDC (reverted to OEEO 1/25)
OEEP Office of Energy and Environmental Policy
OEGT Office of Electronic Government and Technology (changed to e-gov)
OEHE Office of Environmental Health and Engineering
OEHRM Office of Electronic Health Record Modernization (changed to VA EHRM Integration Office)
OEI Office of Environmental Information (unable to verify 12/20)
OEID Office of Economic Impact and Diversity (changed to EJE) | Office of Equity and Innovative Development (unable to verify 1/25)
OEIO Office of Earnings & International Operations
OEIP Office of Enterprise Information Programs
OEIS Office of Energy Infrastructure Security
OEJ Office of Environmental Justice, DOJ (unable to verify 1/25) | Office of Environmental Justice, HHS (unable to verify 1/25)
OEJECR Office of Environmental Justice and External Civil Rights
OEL Ocean Ecology Laboratory | Office of Early Learning (unable to verify 9/24) | Office of English Learners
OELA Office of English Language Acquisition
OELD Operations and Enforcement Law Division
OEM Office of Emergency Management, EPA | Office of Emergency Management, PHE (unable to verify 10/21; likely changed to EMMO) | Office of Emergency Management, State | Office of Environmental Markets
OEMM Offshore Energy and Minerals Management (now part of ONRR)
OEMR Office of Energy Market Regulation
OEMS Office of EMS (Emergency Medical Services)
OEND Opioid Overdose Education & Naloxone Distribution
OEO Office of Enforcement Operations
OEOCRP Office of Equal Employment Opportunity and Civil Rights Programs
OEP Office of Energy Projects | Office of Environmental Programs | Office of Executive Programs | Office of Extramural Policy, NICHD | Office of Extramural Policy, NIDA | Office of Extramural Programs
OEPC Office of Environmental Policy and Compliance
OEPI Office of Energy Policy and Innovation
OEPNU Office of Energy Policy and New Uses
OEPR Office of Extramural Policy and Review (changed to OEP) | Office of Program Evaluation, Performance, and Reporting
OER Office of Economic Resilience (changed to OED) | Office of Electric Reliability | Office of Extramural Research | Office of Ocean Exploration and Research
OERD Ocean Environment Research Division
OEREP Office of Extramural Research, Education, and Priority Populations
OERI Office of Educational Research and Improvement (defunct; see also IES) | Office of Everglades Restoration Initiatives
OERR Office of Emergency Response and Recovery (changed to OMA)
OES Bureau of Oceans and International Environmental and Scientific Affairs | Occupational Employment Statistics (changed to OEWS) | Office of Evaluation Sciences
OESE Office of Elementary and Secondary Education
OES/ECW Office of Conservation and Water
OES/EGC Office of Global Change
OES/OMC Office of Marine Conservation
OES/SA Office of Space Affairs
OES/SAT Office of Space and Advanced Technology (changed to OES/SA)
OET Office of Educational Technology | Office of Engineering and Technology
OEWS Occupational Employment and Wage Statistics
OExS Office of Exporter Services
OFA Office of Family Assistance | Office of Federal Acknowledgement | Office of Federal Activities | Office of Financial Agents
OFAC Office of Foreign Assets Control
OFACMO Office of Federal Advisory Committee Management and Outreach (changed to ODACMO)
OFAM Office of Financial and Administrative Management (unable to verify 12/19)
OFAP Office of Federal Agency Programs
OFAS Office of Facilities and Administrative Services
OFBNP Office of Faith-Based and Neighborhood Partnerships
OFC Office of the Federal Coordinator for Alaska Natural Gas Transportation Projects (defunct as of 3/15)
OFCCP Office of Federal Contract Compliance Programs
OFCIO Office of the Federal Chief Information Officer
OFCM Office of the Federal Coordinator for Meteorology (changed to ICAMS)
OFDA Office of U.S. Foreign Disaster Assistance
OFDC Office of Federal Disaster Coordination (unable to verify 8/20)
OFDT Office of the Federal Detention Trustee (merged into USMS 6/12)
OFECR Office of Facilities, Environmental and Cultural Resources (changed to OFPSM)
OFEE Office of the Federal Environmental Executive (changed to OFS)
OH One Health
OHA Office of Health Affairs (page archived) | Office of Hearings and Appeals (DOE) | Office of Hearings and Appeals (DOI)
OHAIDP Office of HIV/AIDS and Infectious Disease Policy (changed to OIDP)
OHAM Office of HIV and AIDS Malignancy
OHAP Office of HIV/AIDS Policy (changed to OHAIDP)
OHASIS Office of Health and Safety Information System (changed to OSHE)
OHC Office of Habitat Conservation | Office of Housing Counseling
OHCIO Office of Health Center Investment Oversight
OHCM Office of Human Capital Management
OHCPM Office of Health Center Program Monitoring
OHD Office of Hydrologic Development
OHE Occupational Health Equity Program | Office of Health Equity, CDC | Office of Health Equity, NIH (unable to verify 1/25)
OHF Office of Hospital Facilities
OHHABS One Health Harmful Algal Bloom System
OHHLHC Office of Healthy Homes and Lead Hazard Control (changed to OLHCHH)
OHIC Office of Healthcare Information and Counseling
OHL Occupational Hearing Loss
OHO One Health Office
OHPI Office of Highway Policy Information (changed to HPPI)
OHRP Office for Human Research Protections
OHS Office of Head Start | Office of Health Security | Office of Homeland Security, USDA
OHSEC Office of Homeland Security and Emergency Coordination (changed to OHS)
OHSEPR Office of Human Services Emergency Preparedness and Response
OHSES Office of Homeland Security & Emergency Services (unable to verify 2/22)
OHSN Occupational Health Safety Network (retired 9/19)
OHSS Office of Homeland Security Statistics
OHTA Office of Historical Trust Accounting (unable to verify 3/13)
OI Office of Intelligence
OIA Office of Insular Affairs | Office of Integrative Activities | Office of Intelligence and Analysis | Office of International Affairs, DOJ | Office of International Affairs, FCC | Office of International Affairs, NOAA | Office of International Affairs, NTIA | Office of Island Affairs
OIAA Office of Information Analysis and Access (unable to verify 5/20; likely replaced by OIM)
OIAD Office of the Investor Advocate
OIASA Office of Indian Alcohol and Substance Abuse
OIB Independent Living Services for Older Individuals Who Are Blind
OIB-TAC Older Individuals who are Blind Training and Technical Assistance Center
OIC Office of Information Collection (unable to verify 5/20; likely replaced by OIM) | Office of Interoperability and Compatibility (unable to verify 5/21)
OICG Office of Internet Connectivity and Growth
OICI Office of Intelligence and Counterintelligence
OICT Office of Indigenous Communications and Technology
OIC-TC Office for Interoperability and Compatibility Technology Center
OID Office of Infectious Diseases, CDC (changed to DDID) | Office of Infectious Diseases, FDA | Offshore Infrastructure Dashboard
OIDO Office of the Immigration Detention Ombudsman
OIDP Office of Infectious Disease and HIV/AIDS Policy | Office of Intake and Document Production
OIE Office of Indian Education | Office of Inclusive Excellence (unable to verify 1/25) | Office of Innovation and Entrepreneurship | Office of International Engagement
OIEA Office of Internal Evaluation and Assessment (changed to DIEA)
OIEP Office of Indian Education Programs (changed to BIE)
OIEPP Office of Indian Energy Policy and Programs
OIF Office of Internet Freedom
OIFS Office of Investigative and Forensic Sciences
OIFSSP Office of Integrated Food Safety System Partnerships
OIG Office of Indian Gaming | Office of the Inspector General (directory of OIGs)
OIGP Office of Information Governance and Privacy
OII Office of Immunology and Inflammation | Office of Innovation and Improvement (merged into OESE) | Office of Inspections and Investigations
OIIA Office of Intergovernmental and Interagency Affairs (defunct)
OIICS Occupational Injury and Illness Classification System
OIJA Office of International Judicial Assistance
OIL Office of Immigration Litigation
OIM Office of Information Management
OIMT Office of Information Management and Technology
OIP Office of Industry Partnerships | Office of Information Policy | Office of International Policy
OIPC Office of International Patent Cooperation
OIPD Office of Innovative Program Delivery (changed to Office of Performance and Innovative Finance Support)
OIPDA Office of Information Products and Data Analysis (unable to verify 12/19)
OIPL Office of Intergovernmental and Public Liaison (merged into OLA)
OIPR Office of Intelligence Policy and Review (changed to Office of Intelligence)
OIR Office of International Relations | Office of Intramural Research
OIRA Office of Information and Regulatory Affairs
OIREC Office of International Research Engagement and Cooperation
OIRM Office of Information and Resource Management
OIRP Office of International Research Programs (changed to OIREC)
OIS Occupational Information System | Office of Immigration Statistics (replaced by OHSS) | Office of Indian Services | Office of Information Security | OSHA Information System
OISE Office of International Science and Engineering
OISM Office of Information Systems Management
OISP Office of Information Security and Privacy
OISPA Occupational Injury Surveillance of Production Agriculture Survey (page archived)
OISST Optimum Interpolation Sea Surface Temperature
OIT Office of International Trade
OITA Office of International and Tribal Affairs
OITO Office of Information Technology Operations
OIV Office of International Visitors
OMA Office of Mission Assurance
OMAO Office of Marine and Aviation Operations
OMAR Office of Medical Applications of Research (absorbed 1/12 into ODP)
OMB Office of Management and Budget
OMDG Organic Market Development Grant
OMDRHI Office of Medical Device and Radiological Health Inspectorate
OMDRHO Office of Medical Device and Radiological Health Operations (changed to OMDRHI)
OME Office of Migrant Education | Office of Minority Economic Impact (changed to OEID)
OMFS Office of Microbiological Food Safety
OMG Oceans Melting Greenland
OMH Office of Minority Health
OMHA Office of Medicare Hearings and Appeals
OMHAR Office of Multifamily Housing Assistance Restructuring (replaced by OAHP)
OMHD Office of Minority Health and Health Disparities (changed to OMHHE)
OMHHE Office of Minority Health & Health Equity, CDC (changed to OHE) | Office of Minority Health and Health Equity, FDA (unable to verify 1/25)
OMHP Office of Manufactured Housing Programs
OMHR Office of Minority Health and Research (unable to verify 11/2011; likely replaced by OSPD)
OMI Office of the Medical Inspector | Office of Multilingual Initiatives
OMIM Online Mendelian Inheritance in Man
OMIS Office of Management and International Services
OMM Offshore Minerals Management Program (changed to OEMM, then ONRR)
OMP Office of Management Programs | Office of Medical Policy | Office of Minority Programs (unable to verify 1/25)
OMPF Official Military Personnel Files
OMPI Office of Medical Policy Initiatives
OMPS Ozone Mapping and Profiler Suite
OMPTO Office of Medical Products and Tobacco Operations
OMQ Office of Manufacturing Quality
OMRL Organic Matter Research Laboratory
OMS Office of Management Services | Office of Marine Safety | Office of Mission Support | Office of Municipal Securities
OMSHR Office of Mine Safety and Health Research
OMUFA Over-The-Counter Monograph Drug User Fee Program
OMUMS Office of Minor Use and Minor Species
OMWI Office of Minority & Women Inclusion, CFPB | Office of Minority and Women Inclusion, SEC
ON Office of Neuroscience
ONA Office of Net Assessment
ONAA Office of Native American Affairs
ONAC Office of National Autism Coordination
ONADE Office of New Animal Drug Evaluation
ONAP Office of National AIDS Policy | Office of Native American Programs
ONC Office of the National Coordinator for Health Information Technology (changed to ASTP/ONC 7/24)
ONCD Office of the National Cyber Director
ONCIX Office of the National Counterintelligence Executive (absorbed into NCSC)
OND Office of New Drugs
ONDCP Office of National Drug Control Policy
ONDIEH Office of Noncommunicable Diseases, Injury and Environmental Health (changed to Deputy Director for Non-Infectious Diseases (unable to verify 5/24)
ONDP Office of New Drug Policy | Office of New Drug Products (renamed/reorganized into OPQA)
ONES Office of National Examinations and Supervision (unable to verify 3/19)
O*NET Occupational Information Network
ONHIR Office of Navajo and Hopi Indian Relocation
ONHR Office of Native Hawaiian Relations
ONI Oceanic Niño Index
ONL Office of National Laboratories
ONMS Office of National Marine Sanctuaries
ONP Office of National Programs
ONPD Office of Non-Prescription Drugs
ONPE Office of Non-Public Education
ONR Office of National Response (unable to verify 3/19) | Office of Nutrition Research
ONRR Office of Natural Resources Revenue
ONS Office of National Security | Office of Nursing Services
ONSC Office of National Security Controls
On-TRAC Online Technical Resource and Assistance Center
OOC Office of Compliance (changed to OCWR)
OOD Office of Oncologic Diseases
OOH Occupational Outlook Handbook
OOM Office of Organizational Management
OOPD Office of Orphan Products Development
OOQ Occupational Outlook Quarterly (changed to Career Outlook)
OOR Office of Obesity Research | Office of Operations and Resources (unable to verify 2/23)
OORP Office of Offshore Regulatory Programs
OOS Office of Operational Systems (unable to verify 5/18)
OP Office of Policy, DOE (unable to verify 12/20) | Office of Policy, EPA | Office of Proceedings
OPA Office of Ocean and Polar Affairs | Office of People Analytics | Office of Pharmacy Affairs | Office of Political Affairs | Office of Population Affairs | Office of Project Assessment | Office of Public Affairs
OPAD Office of Policy Analysis and Development
OPAE Office of Planning, Analysis and Evaluation
OPAGAC Office of Public Assistance, Governmental Affairs, and Compliance
OPAL Office of Procurement, Acquisition and Logistics
OPAPH Office of Policy Analytics & Population Health (changed to PAEO)
OPART Office of Performance, Accountability, Resources, and Technology (changed to COE)
OPB Office of Performance Budgeting
OPC Ocean Policy Committee | Ocean Prediction Center | Office of Professional Conduct | Office of the Police Corps (defunct)
OPCL Office of Privacy and Civil Liberties
OPDAT Office of Overseas Prosecutorial Development, Assistance and Training
OPDP Office of Prescription Drug Promotion
OPDR Office of Policy Development and Research | Online Public Disclosure Room
OPE Office of Partner Engagement | Office of Partnership and Engagement | Office of Postsecondary Education | Office of Public Engagement, Commerce | Office of Public Engagement, USPTO | Office of Public Engagement, White House
OPEM Office of Property and Environmental Management
OPEN Online Professional English Network | Organizations Preparing for Emergency Needs
OPEO Office of Preparedness and Emergency Operations (changed to OEM)
OPEP Office of Program Evaluation and Performance (changed to OEPR)
OPEPD Office of Planning, Evaluation and Policy Development
OPF Official Personnel Folders
OPG Operations Proving Ground
OPH Office of Public Health
OPHDST Office of Public Health Data, Surveillance, and Technology
OPHER Office of Public Health Ethics and Regulations
OPHG Office of Public Health Genomics (changed to OGPPH)
OPHS Office of Public Health Science
OPHSS Office of Public Health Scientific Services (changed to DDPHSS)
OPI Office of Payment Integrity (unable to verify 9/24) | Office of Preservation Initiatives
OPIC Overseas Private Investment Corporation (changed to DFC)
OPIE Office of Policy and International Engagement
OPL Office of Policy and Legislation
OPLA Office of the Principal Legal Advisor
OPL-IGA Office of Public Liaison & Intergovernmental Affairs (changed to Office of Public Engagement, OPE)
OPM Office of Personnel Management | Office of Operations Program Management
OPMA Office of Pharmaceutical Manufacturing Assessment
OPMP Office of Pest Management Policy
OPO Office of Program Operations
OPOG Office of Privacy and Open Government
OPP Obstetric & Pediatric Pharmacology Branch (changed to OPPTB) | Office of Pesticide Programs | Office of Polar Programs | Office of Public Participation
OPPA Office of Policy and Program Analysis | Office of Projects, Partnerships, and Analysis (changed to SWO; previously, Office of Projects, Planning, and Analysis)
OPPD Office of Policy and Program Development
OPPE Office of Partnerships and Public Engagement | Office of Policy, Performance, and Evaluation
OPPM Office of Performance and Personnel Management | Office of Planning and Performance Management (changed to OBPM)
OPPPD Office Of Policy, Partnerships and Program Development
OPPQ Office of Policy for Pharmaceutical Quality
OPPR Office of Pandemic Preparedness and Response Policy
OPPS Office of Planning and Policy Support
OPPSD Office of Planning and Programming for Service Delivery
OPPT Office of Pollution Prevention and Toxics
OPPTB Obstetric and Pediatric Pharmacology and Therapeutics Branch
OPPTM Office of Personal Property and Transportation Management
OPPTS Office of Prevention, Pesticides, and Toxic Substances (changed to OCSPP)
OPQ Office of Pharmaceutical Quality
OPQA Offices of Product Quality Assessment
OPQR Office of Pharmaceutical Quality Research
OPR Office of Passenger Rail | Office of Petroleum Reserves | Office of Professional Responsibility | Office of Protected Resources | Online Passport Renewal (pdf) | Senate Office of Public Records
OPRE Office of Planning, Research and Evaluation
OPRO Office of Program and Regulatory Operations
OPS Office of Pipeline Safety | Office of Private Sector
OPSA Office of Program and Strategic Analysis
OPSC Office of Public Safety Communications
OPSEC National Operations Security
OPSG Operation Stonegarden
OPSO Office of Physical Sciences - Oncology (changed to PS-ON)
OPT Office of Pediatric Therapeutics
OPTF Obscenity Prosecution Task Force (absorbed into CEOS)
OPTN Organ Procurement and Transplantation Network
OPU Operational Projects Unit (changed to Operational Projects)
OPUS Online Positioning User Service
OQA Office of Quality Assurance
OQAM Office of Quality Assessment and Management
OQI Office of Quality Improvement
OQS Office of Quality Surveillance
OR Office of Recovery
ORF Oral Reading Fluency Study
ORHP Office of Rural Health Policy (changed to FORHP)
ORI Office of Regional Intelligence | Office of Research Integrity
ORIA Office of Radiation and Indoor Air
ORIP Office of Research Infrastructure Programs
ORISE Oak Ridge Institute for Science and Education
ORLP Outdoor Recreation Legacy Partnership
ORM Ocean Resource Management Subcommittee | Office of Research and Methodology (unable to verify 12/20) | Office of Resolution Management | Office of Resource Management, ASPR (unable to verify 7/24) | Office of Resource Management, FDA
ORMDI Office of Resolution Management, Diversity & Inclusion (reverted to ORM 2/25)
ORMH Office of Research on Minority Health (changed to OMHR, then to OSPD)
ORNL Oak Ridge National Laboratory
ORNL DACC Oak Ridge National Laboratory Distributed Active Archive Center
ORO Office of Regulatory Operations
ORP Office of Recovery Programs | Office of Regulatory Policy | Office of River Protection
ORPB Outbreak Response and Prevention Branch
ORPM Office of Regulatory Policy and Management
ORPP Office of Real Property Programs
ORPS Occurrence Reporting and Processing System
ORPURM Office of Rare Diseases, Pediatrics, Urologic and Reproductive Medicine
OR&R Office of Response and Restoration
ORR Office of Readiness and Response | Office of Refugee Resettlement | Office of Response and Recovery | Office of Response and Restoration | Operational Readiness Review
ORS Occupational Requirements Survey | OFAC Reporting System | Office of Radiological Security | Office of Resource Sustainability
ORSA Outdoor Recreation Satellite Account
ORSC Obesity Research Strategic Core (unable to verify 2/16)
ORTA Office of Research, Transition, and Application
ORWH Office of Research on Women's Health
OS Office of Science  | Operations Support Office
OS3I Open-Source Software Security Initiative
OS&C Office of Surveillance and Compliance
OSE Office of Science Education | Office of Surveillance and Epidemiology | Open Source Enterprise (decommissioned 10/19)
OSEA Office of Strategic Engagement and Assessments (unable to verify 1/25)
OSEC Office of the Secretary, Dept. of Labor
OSEEP Office of Sustainable Energy and Environmental Programs
OSEL Office of Science and Engineering Laboratories
OSELS Office of Surveillance, Epidemiology, and Laboratory Services (changed to CSELS)
OSEM Office of Strategic Environmental Management
OSEOD Office of Strategic Employee and Organization Development
OSEP Office of Special Education Programs
OSERS Office of Special Education and Rehabilitative Services
OSF Office of Space Flight (changed to Office of Space Operations, then to HEO) | Office of Sustainable Fisheries
OSFAP Office of Student Financial Assistance Programs (changed to FSA)
OSFR Oil Spill Financial Responsibility
OSG Office of Self-Governance | Office of the Solicitor General | Office of the Surgeon General
OSGS Office of Satellite Ground Services (changed to OCS)
OSH Office of Occupational Safety and Health | Office on Smoking and Health
OSHA Occupational Safety and Health Administration | Office of Special Health Affairs (unable to verify)
OSHC Office of Sustainable Housing and Communities (unable to verify 2/14; likely changed to Office of Sustainable Communities, unable to verify 11/22)
OSHE Office of Safety, Health, and Environment (unable to verify 5/24)
OSHI Office of Special Health Initiatives
OSHRC Occupational Safety and Health Review Commission
OSHS Office of Safe and Healthy Students (changed to OSSS)
OSI Office of Scientific Integrity (unable to verify 10/26; likely merged into OPHER) | Office of Scientific Investigations | Office of Special Investigations (merged into HRSP) | Office of Strategic Initiatives
OSIM Office of Scientific Information Management (changed to ODS)
OSIS Office of Study Integrity and Surveillance
OSLLE Office for State and Local Law Enforcement
OSLTC Office of State, Local and Tribal Coordination (unable to verify 11/16)
OSM Office of Special Masters | Office of Specialty Medicine | Office of Spectrum Management | Office of Systems Management (unable to verify 2/23)
OSMA Office of Safety and Mission Assurance
OSMC Observing System Monitoring Center
OSMO Office of Science Management and Operations
OSMP Office of Special Medical Programs (unable to verify 1/20)
OSMR Office of Survey Methods Research
OSMRE Office of Surface Mining Reclamation and Enforcement
OSO Oak Ridge National Laboratory Site Office | Office of Satellite Operations (merged into OSPO) | Office of Space Operations (changed to HEO) | Office of Support Operations
OSP Office of Science Policy (changed to OSAPE) | Office of Strategic Planning and Policy Analysis (unable to verify 12/18) | Office of Strategic Policy | Office of Strategic Programs, CDER | Office of Strategic Programs, HFP
OSPA Office of Science Planning and Assessment (defunct)
OSPAC Office of Science Policy, Analysis and Communication (changed to OSPRA)
OSPC Office of Science Policy and Communications
OSPD Office of Special Programs in Diversity (unable to verify 5/16) | Oil Spill Preparedness Division
OSPO Office of Satellite and Product Operations
OSPPI Office of Strategic Planning and Performance Improvement
OSPRA Office of Science Policy, Reporting, and Program Analysis
OSQ Office of Science Quality (changed to OSQLS)
OSQI Office of Science Quality and Integrity
OSQLS Office of Science Quality and Library Services
OSQR Office of Scientific Quality Review
OSRA Ocean Shipping Reform Act
OSRP Off-Site Source Recovery Program
OSRTI Office of Superfund Remediation and Technology Innovation
OSS Office of Science Support | Office of State Support (changed to SSA)
OSSI Open-Source Science Initiative
OSSPI Office of Shared Solutions and Performance Improvement
OSSRP Office of Surveillance Strategy and Risk Prioritization
OSSS Office of Safe and Supportive Schools
OST Ocean Science and Technology Subcommittee | Office of School Turnaround (unable to verify 5/24) | Office of Secure Transportation | Office of Strategic Partnerships and Technology Innovation | Office of the Special Trustee for American Indians | Out of School Time
OST-F Office of Multimodal Freight Infrastructure and Policy
OSTI Office of Science and Technology Integration | Office of Scientific and Technical Information
OSTLTS Office for State, Tribal, Local and Territorial Support (changed to CSTLTS)
OSTM Ocean Surface Topography Mission
OSTP Office of Science and Technology Policy
OST-R Office of the Assistant Secretary for Research and Technology
OSTR Office of Science and Technology Resources
OST-Z National Surface Transportation and Innovative Finance Bureau: Build America Bureau
OSWER Office of Solid Waste and Emergency Response (changed to OLEM)
OT Office of Technology | Office of Trade
OTA Office of Tax Analysis | Office of Technology Assessment (defunct) | Office of Tribal Affairs (unable to verify 11/16; possibly changed to TSU)
OTAP Office of Tribal Affairs and Policy
OTAQ Office of Transportation and Air Quality
OTASA Office of Tribal Affairs and Strategic Alliances
OTAT Office of Tissues and Advanced Therapies
OTBB Office of Therapeutic Biologics and Biosimilars
OTC Operational Technology and Cyber Division (changed to Cyber and Operational Technology Division)
OTCD Operational Technology and Cyber Division (changed to OTC)
OTCnet Over-the-Counter Channel Application
OTD Office of Training and Development (merged into OTTP) | Office of Training and Diversity (unable to verify 3/19) | Operational Technology Division (changed to Operational Technology)
OTE Office of Technology Evaluation
OTech Office of Technology Research and Investigation (unable to verify 7/24)
OTECP Organic and Transitional Education and Certification Program (site archived 5/23)
OTED Office of Training Education and Development
OTEXA Office of Textiles and Apparel
OTF Open Technology Fund | Outdoor Test Facility
OTGR Office of Tribal Government Relations
OTI Ocean Transportation Intermediaries | Office of Technology and Innovation (changed to TTO) | Office of Transition Initiatives | OSHA Training Institute
OTIA Office of Telecommunications and Information Applications (changed to OICG)
OTIP Office of Tribal and Indigenous Peoples | Office on Trafficking in Persons
OTIPI Office of Translational Initiatives and Program Innovations
OTIS Online Tracking Information System (replaced by ECHO) | Online Tuberculosis Information System
OTJ Office of Tribal Justice
OTLA Office of Trade and Labor Affairs
OTM OSHA Technical Manual
OTMP Office of Trade and Manufacturing Policy (unable to verify 2/21)
OTOP Office of Technology Operations and Planning (changed to OITO)
OTP Office of Tax Policy | Office of Technology Policy (defunct) | Office of Therapeutic Products | Open Textbooks Pilot Program
OTPS Office of Technology, Policy, and Strategy
OTR Office of Translational Resources | Office of Tribal Relations | Office of Trust Records
OTS Office of Thrift Supervision (merged into OCC) | Office of Translational Sciences | Office of Trust Services
OTSG Office of Tribal Self-Governance
OTT Office of Technology Transitions | Office of Technology Transfer | Office of Transportation Technologies (changed to FreedomCAR, then VTO)
OTTI Office of Travel and Tourism Industries (changed to NTTO)
OTTP Office of Training and Tactical Programs (changed to OLCD)
OTVTP Office for Targeted Violence and Terrorism Prevention (replaced by CP3)