The Oak Ridge National Laboratory (ORNL) conducts world-leading research in advanced materials exploration, alternative fuels, clean energy, and supercomputing.

The Occupational Safety and Health Administration (OSHA) assures safe and healthful working conditions by setting and enforcing standards, and by providing training, outreach, education and assistance.

The Occupational Safety and Health Review Commission (OSHRC) hears trials and appeals, deciding contests of citations or penalties that result from inspections performed by the Occupational Safety and Health Administration.

The Bureau of Ocean Energy Management (BOEM) promotes energy independence, environmental protection, and economic development by managing offshore energy resources.

The Office for Civil Rights (OCR) works to ensure equal access to education and resolve complaints of discrimination.

The Office for Civil Rights helps to protect you from discrimination in certain healthcare and social service programs.

The Office of Career, Technical, and Adult Education (OCTAE) administers and coordinates programs that are related to adult education and literacy, career and technical education, and community colleges.

The Office of Child Support Services (OCSS) assures that support (both financial and medical) is available to children through locating parents, establishing paternity, identifying support obligations, and enforcing those obligations.

The Office of Community Planning and Development (CPD) develops communities by promoting decent housing, suitable living environments, and expanded economic opportunities for low and moderate income people.

The Office of Congressional Workplace Rights (OCWR) advances workplace rights, safety, health, and accessibility in the Legislative Branch.

The Office of Cuba Broadcasting provides the Cuban people with news and information.

The Office of Disability Employment Policy (ODEP) creates policies to ensure that people with disabilities are fully integrated in the workforce.

The Office of Elementary and Secondary Education (OESE) works to improve the achievement of students in preschool through secondary school. The office also works to ensure equal education opportunities for all, and to provide assistance to state and local schools.

The Office of Energy Efficiency and Renewable Energy (EERE) answers questions about EEREs products, services, and technology programs, and refers callers to the most appropriate EERE resources.

Part of the Department of Education, the Office of English Language Acquisition (OELA) supports programs for students learning English.

The Office of Environmental Management cleans up nuclear weapons test sites and government sponsored nuclear energy research sites.

The Office of Fair Housing and Equal Opportunity (FHEO) enforces federal laws and establishes policies to ensure that all Americans have equal access to the housing of their choice.

The Office of Fossil Energy and Carbon Management (FECM) is responsible for research and development of programs involving coal, petroleum, and natural gas.

The Office of Government Ethics (OGE) provides oversight, policy, and guidance to the Executive Branch regarding ethics laws and policies.

The Office of Housing regulates the housing industry and administers the Federal Housing Administration. The regulatory programs administered by the Office of Housing include single family housing and multifamily housing programs.

The Immigrant and Employee Rights Section (IER) is responsible for protecting immigrants authorized to work in the U.S. against employment discrimination.

The Office of Investor Education and Advocacy (OIEA) is part of the U.S. Securities and Exchange Commission. They serve individual investors and are ready to assist you in resolving your complaints and answering questions.

The Office of Justice Programs (OJP) is a research and grant-making organization that works to provide local and state law enforcement agencies with information, training, coordination, and innovative strategies for dealing with the most pressing law enforcement issues.

The Office of Juvenile Justice and Delinquency Prevention (OJJDP) sponsors research, programs and training initiatives in an effort to strengthen the juvenile justice system and serve at risk youth and their families.

The Office of Lead Hazard Control and Healthy Homes (OLHCHH) works to make private homes safe from lead and other harmful materials.

The Office of Local Defense Community Cooperation helps states and communities adjust to major changes related local Department of Defense activities and installations.

The Office of Management and Budget (OMB) oversees the performance of federal agencies, and administers the federal budget.

The Manufactured Housing Program (OMHP) is a consumer protection program that regulates the construction of certain factory-built housing units called "manufactured homes".

The Office of Minority Health (OMH) improves the health of racial and ethnic minority populations through the development of health policies and programs.

The Office of Multifamily Housing (MFH) Programs administers the Department of Housing and Urban Development's multifamily housing programs through a network of local offices across the country.

The Office of National Drug Control Policy (ONDCP) advises the president on drug-control issues.

The Office of Natural Resources Revenue (ONRR) manages the revenues from energy and mineral leases for the use of public natural resources on the Outer Continental Shelf and onshore Federal and American Indian lands.

The Office of Nuclear Energy works to improve the safety, cost, security, and efficiency of nuclear energy generation.

The Office of Personnel Management (OPM) manages the civil service of the federal government, coordinates recruiting of new government employees, and manages their health insurance and retirement benefits programs. They also provide resources for locating student jobs, summer jobs, scholarships, and internships.

The Office of Policy Development and Research (PD&R) provides the Department of Housing and Urban Development up-to-date information and analysis of housing and community development issues.

The Office of Postsecondary Education (OPE) develops programs to increase access to postsecondary education. This office works with state accreditation agencies to recognize institutions of higher learning that provide quality education.

The Office of Refugee Resettlement (ORR) promotes the health, well-being, and stability of refugees, unaccompanied children, and other eligible individuals and families through culturally responsive, trauma-informed, and strengths-based services.

The Office of Science and Technology Policy (OSTP) advises the president on the effects of science and technology on domestic and international affairs.

The Office of Scientific and Technical Information (OSTI) collects, preserves, and makes available the results of research and development carried out or sponsored by the Department of Energy.

The Consumer Financial Protection Bureau's Office of Servicemember Affairs (OSA) addresses consumer financial challenges affecting military members, veterans, and their families.

The Office of Special Counsel (OSC) is an investigative and prosecutorial office that works to end government and political corruption, and to protect government employees and whistleblowers.

The Office of Special Education and Rehabilitative Services (OSERS) provides a wide array of supports to parents, students, school districts, and states in three main areas: special education, vocational rehabilitation, and research.

The Office of Surface Mining, Reclamation and Enforcement (OSMRE) protects populations and the environment during surface coal mining operations. The Office also works to clean and put to good use abandoned mine sites. These missions are accomplished primarily through regulation and oversight of state programs.

The Office of Textiles and Apparel (OTEXA) works on textile trade policy, and textile trade agreements.

The Office of the Assistant Secretary for Research and Technology coordinates the Department of Transportation's research initiatives and deploys new technologies.

The Office of the Comptroller of the Currency (OCC) charters, regulates, and supervises all national banks. It also supervises the federal branches and agencies of foreign banks.

The Office of the Director of National Intelligence (ODNI) integrates the intelligence gathering and analysis functions performed across the intelligence community to provide intelligence to decision makers.

The Office of the Federal Register (OFR) oversees the Federal Register publication system, making available the full text of federal laws and regulations, presidential documents, and other federal program information.

The Office of the Pardon Attorney assists the president in the exercise of executive clemency by reviewing clemency applications and making recommendations.

The Office of Weights and Measures (OWM) promotes uniformity in U.S. weights and measures laws, regulations, and standards to achieve equity between buyers and sellers in the marketplace.

The Office on Violence Against Women (OVW) reduces violence against women. They help victims of domestic violence, dating violence, sexual assault, and stalking.

If you are in immediate danger, call 911.

The Open World Leadership Center administers the Open World program, one of the most effective U.S. exchange programs for countries of the post-Soviet era.