Arm (disambiguation)
- AR Murugadoss
- ARM (film)
- ARM (novella)
- ARM Cement Limited
- ARM architecture family
- Abstract rewriting machine
- Adjustable-rate mortgage
- Advanced Robotics for Manufacturing
- Africa Reparations Movement
- African Rainbow Minerals
- African Resistance Movement
- Afrikaner Weerstandsbeweging
- Aldo-keto reductase family 1, member A1
- Amalgamated Regional Militia
- American Racing Manual
- Animal Rights Militia
- Anorectal malformation
- Anti-radiation missile
- Application Response Measurement
- Argentine peso moneda nacional
- Arm (dominoes)
- Arm (geography)
- Arm (software)
- Arm Holdings
- Arm River (disambiguation)
- Arm, Mississippi
- Armada República Mexicana
- Armadale railway station, Melbourne
- Armageddon (MUD)
- Armament
- Armenia
- Armenian language
- Armidale Airport
- Arming (disambiguation)
- Arms (disambiguation)
- Army of the Republic of Macedonia
- Asociația Radioamatorilor din Moldova
- Association of Radical Midwives
- Association of Railway Museums
- Association of Recovering Motorcyclists
- Associação dos Radioamadores de Macau
- Asteroid Redirect Mission
- Atmospheric Radiation Measurement
- Australian Republican Movement
- Autism rights movement
- County Armagh
- Distributary
- Enontekiö
- Firearm
- List of ARM microarchitectures
- Total Annihilation