FBI - Federal Bureau of Investigation, a bureau within the Department of Justice FBI

CIA - Central Intelligence Agency, an independant government agency CIA

NSA - National Security Agency, an intelligence/combat support agency within the Department of Defense National Security Agency

DoD - Department of Defense United States Department of Defense

USDA - Department of Agriculture United States Agriculture Department

DoC - Department of Commerce US Department of Commerce

DoI - Department of the Interior US Department of the Interior

DoL - Department of Labor US Department of Labor

DoS - Department of State

DoT - Department of Transportation

DoJ - Department of Justice

ED - Department of Education US Department of Education

HHS - Department of Health and Human Services US Department of Health

DoE - Department of Energy US Department of Energy

VA - Department of VeteransAffairs U.S. Department of Veterans

HUD - Department of Housing and Urban Development U.S. Department of Housing and Urban Development

DHS - Department of Homeland Security Department of Homeland Security

DEA - Drug Enforcement Administration Narcotics Control Bureau

ICE - United States Immigration and Customs Enforcement U.S. Immigration and Customs Enforcement

IRS - Internal Revenue Service Internal Revenue Service

ATF - Bureau of Alcohol, Tobacco, Firearms & Explosives

NCIS - Naval Criminal Investigative Service

JAG - Judge Advocate General U.S. Navy Judge Advocate General

(A)USA - (Assistant) United States Attorney U.S. Government Counsel

USCIS - United States Citizenship and Immigration Service United States Citizenship and Immigration Service< /p>

USPS - United States Postal Service

SEC - Security and Exchange Commission National Securities and Exchange Commission

FCC - Federal Communication Commission United States Federal Communications Commission< /p>

FTC - Federal Trade Commission United States Federal Trade Commission

FAA - Federal Aviation Administration Federal Aviation Administration

NTSB - National Transportation Safety Board United States National Transportation Safety Board

p>

GSA - General Service Administration, U.S. federal government

DIA - Defense Intelligence Agency Defense Intelligence Agency

NRO - National Reconnaissance Office, U.S. National Reconnaissance Office

NGA - National Geospatial-Intelligence Agency US National Geospatial-Intelligence Agency

EPA - Environmental Protection Agency US Environmental Protection Agency

FEC - Federal Election Commission Federal Election Commission

NASA - National Aeronautics and Space Administration

NSF - National Science Foundation National Natural Science Foundation

AMTRAK - National Railroad Passenger Corporation American National Railway Passenger Transportation Company

SSA - Social Security Administration United States Social Security Administration

NOAA - National Oceanic & Atmospheric Administration United States Oceanic and Atmospheric Administration

USGS - United States Geological Survey United States Geological Survey

FEMA - Federal Emergency Management Agency Federal Emergency Management Agency

CBP - United States Customs and Border Protection United States Customs and Border Protection

< p>CDC - Centers for Disease Control and Prevention

FDA - Food and Drug Administration National Food and Drug Administration

NIH - National Institutes of Health National Medical Research Academy

DARPA - Defense Advanced Research Projects Agency U.S. Department of Defense Advanced Research Projects Agency