Alphabet agency

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Concept.png Alphabet agencyRdf-entity.pngRdf-icon.png
Acronym used to describe U.S. intelligence agencies

Since the 1990s, the term alphabet agencies has been commonly used to describe the agencies of the U.S. national security state. Many are members of the United States Intelligence Community,[1][2] and several were founded or expanded in the aftermath of the September 11 attacks.[3][4][5] Alphabet agencies in this sense of the term may also be called three-letter agencies,[6] because they often use three-letter acronyms.

Initialism Year Agency
ATF 1972 Bureau of Alcohol, Tobacco, Firearms and Explosives
CIA 1947 Central Intelligence Agency
DEA 1973 Drug Enforcement Administration
DIA 1961 Defense Intelligence Agency
DHS 2002 Department of Homeland Security
DOJ 1870 Department of Justice
FBI 1908 Federal Bureau of Investigation
FEMA 1979 Federal Emergency Management Agency
ICE 2003 Immigration and Customs Enforcement
NGA 2003 National Geospatial-Intelligence Agency
NRO 1961 National Reconnaissance Office
NSA 1953 National Security Agency
ONI 1882 Office of Naval Intelligence
OSI 1949 Office of Scientific Intelligence
TSA 2001 Transportation Security Administration


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