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An arm is an upper limb of the body.

Arm or ARM may also refer to:

Geography

• Arm, Mississippi, an unincorporated community in Lawrence County, Mississippi
• Arm (geography), a narrow stretch of a larger body of water
  • Distributary or arm, a subsidiary branch of a river
• Arm River (disambiguation), several rivers and locations
• "Arm of Finland" (Suomen käsivarsi), widely known geographical nickname for the municipality of Enontekiö
• County Armagh, Northern Ireland, Chapman code ARM
• Armenia (ISO 3166-1 alpha-3 country code)

Science and medicine

• Anorectal malformation, a birth defect in which the rectum is malformed
• Aldo-keto reductase family 1, member A1, an enzyme

Technology

• Asteroid Redirect Mission, a proposed NASA mission
• Atmospheric Radiation Measurement, a program of the United States Department of Energy
• Advanced Robotics for Manufacturing, a consortium established in 2017

Computing

• ARM architecture family, a RISC instruction set family
• Arm Holdings, a British multinational company that designs the ARM computer processors
• Application Response Measurement, an open standard for diagnosing performance bottlenecks
• Abstract rewriting machine, a virtual machine
• Arm (software), a CLI status monitor for Tor

Weaponry

• Armament, any implement or device that is used to deter, threaten, inflict physical damage, harm, or kill
  • Firearm, a portable gun
• Anti-radiation missile, a missile designed to detect and home in on an enemy radio emission source

Fiction

• ARM (film), a 2024 Indian film
• ARM (novella), a novella by Larry Niven
  • Amalgamated Regional Militia, a fictional group from Larry Niven's Known Space universe
• Armageddon (MUD) or Arm, a text-based online role-playing game
• ARM, a faction in Chris Taylor's video game Total Annihilation

Organizations and movements

• Africa Reparations Movement, a British organization advocating reparations for slavery (1993–2000)
• African Rainbow Minerals, a mining company based in South Africa
• African Resistance Movement, an anti-apartheid movement in South Africa in the 1960s
• Afrikaner Weerstandsbeweging (English: Afrikaner Resistance Movement)
• Animal Rights Militia, a banner used by animal rights activists
• ARM Cement Limited, a mining and manufacturing company in Kenya
• Army of the Republic of Macedonia (now Army of the Republic of North Macedonia)
• Associação dos Radioamadores de Macau, an amateur radio organization in Macao
• Asociația Radioamatorilor din Moldova, an amateur radio organization in Moldova
• Association of Radical Midwives, a UK organisation for midwives
• Association of Railway Museums, an organization in North America
• Association of Recovering Motorcyclists, an international motorcycle association
• Australian Republican Movement, a lobby group that promotes changing Australia to a republic
• Autism rights movement, a social movement

Other uses

• Arm (dominoes), a line of dominoes with one open end
• Armenian language (ISO 639-2 code)
• Adjustable-rate mortgage, a type of mortgage loan
• Argentine peso moneda nacional (ISO 4217 code), a former currency of Argentina
• Armada República Mexicana, a ship prefix of the Mexican Navy
• American Racing Manual, a publication covering Thoroughbred horse racing in the United States
• Armidale Airport, IATA airport code "ARM"
• Armadale railway station, Melbourne
• AR Murugadoss, also known as ARM, Indian filmmaker

See also

• Arms (disambiguation)
• Arming (disambiguation)
• Lever arm, a concept used in the calculation of torque, the rotational analogue of linear force
• List of ARM microarchitectures

• Disambiguation pages