# Arm (disambiguation)

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