| Acronym | Definition |
|---|
| ARM | Adjustable Rate Mortgage |
| ARM | Anti-Radiation Missile |
| ARM | Atmospheric Radiation Measurement (Program) |
| ARM | Application Response Measurement |
| ARM | Armenian |
| ARM | Associate in Risk Management (Insurance Institute of America) |
| ARM | Armored |
| ARM | Accredited Residential Manager (Real Estate Institute of Canada accreditation) |
| ARM | Accounts Receivable Management |
| ARM | Armament |
| ARM | Annual Research Meeting |
| ARM | Armagh |
| ARM | Archives and Records Management |
| ARM | ArvinMeritor Inc (stock symbol) |
| ARM | Association of Radical Midwives (UK) |
| ARM | Auto Repair Manual |
| ARM | Age-Related Maculopathy (ophthalmology) |
| ARM | Administrative Rules of Montana |
| ARM | Association for Research on Mothering |
| ARM | Australian Republican Movement |
| ARM | Association Rule Mining (algorithm) |
| ARM | Ada Reference Manual |
| ARM | Annotated Reference Manual |
| ARM | Association of Rotational Molders |
| ARM | Always Remember Me |
| ARM | Asynchronous Response Mode |
| ARM | Animal Rights Militia (extremist group) |
| ARM | Adaptive Resource Management |
| ARM | Adaptive and Reflective Middleware (Workshop) |
| ARM | Artificial Rupture of Membranes (amniotomy) |
| ARM | Assistant Regional Manager |
| ARM | Active Risk Manager |
| ARM | Afrikaner Resistance Movement (South Africa) |
| ARM | Angiographie par Résonance Magnétique (French: Magnetic Resonance Angiography; medical imaging) |
| ARM | Anorectal Manometry |
| ARM | Application Reference Model |
| ARM | Accredited Resident Manager |
| ARM | Armed Resistance Movement (South Africa) |
| ARM | Application Resource Manager |
| ARM | Académie Royale Militaire (French: Royal Military Academy) |
| ARM | Active Registry Monitor |
| ARM | Anhysteretic Remanent Magnetization |
| ARM | African Resistance Movement |
| ARM | Africa Reparations Movement |
| ARM | Alliance Réformée Mondiale (French: World Alliance of Reformed Churches) |
| ARM | Accord de Reconnaissance Mutuelle (French: Mutual Recognition Agreement; Canada) |
| ARM | Association of Railway Museums |
| ARM | Acquisition Risk Management |
| ARM | Availability, Reliability, Maintainability |
| ARM | Automated Records Management |
| ARM | Atmospheric Radiation Monitoring |
| ARM | Air Resources Management |
| ARM | Alianza Reformada Mundial (Spanish: Reformed Alliance World-wide) |
| ARM | American Rehabilitation Ministries |
| ARM | Accountability Research and Measurement |
| ARM | Automated Requirement Measurement |
| ARM | Advanced Robot Motion |
| ARM | Amalgamated Regional Militia |
| ARM | Active Reliable Multicast |
| ARM | Armidale, New South Wales, Australia - Armidale (Airport Code) |
| ARM | Association of Recovering Motorcyclists |
| ARM | Active Reconfiguring Message |
| ARM | Active Region Monitor |
| ARM | Area Radiation Monitor |
| ARM | Apple Rejected Me (website) |
| ARM | Atomic Resolution Microscope |
| ARM | Anti-Robot Militia |
| ARM | Academy for Ranch Management |
| ARM | Aahh Real Monsters (Nickelodeon TV show) |
| ARM | Association of Responsible Media (various locations) |
| ARM | Accelerated Reply Mail |
| ARM | Armada de la República Mexicana |
| ARM | Associated Radio Manufacturers (lobbyist group for radio standards; established 1924) |
| ARM | Athénée Royal de Mons |
| ARM | Active Revenue Management (Convergys) |
| ARM | Artillery, Rockets, and Mortars |
| ARM | Aircraft Armorer |
| ARM | After Receipt of Material |
| ARM | Automatic Resource Manager |
| ARM | Analyse du Risque Médical (French: Analysis of Medical Risk; Nice, France) |
| ARM | Air Release Mechanism |
| ARM | Ada Requirements Methodology |
| ARM | Array Regulator Module |
| ARM | Adaptive Reliable Multicast (wireless protocol) |
| ARM | AutoCAD Reference Manual |
| ARM | Advanced RISC (Reduced Instruction Set Computer) Machine (now ARM) |
| ARM | Area Revenue Manager |
| ARM | Aircraft Readiness Model (DoD developed software) |
| ARM | Army Ready Materiel |
| ARM | Automatic Reel Mounting |
| ARM | Administrative Reference Manual |
| ARM | ADP Resources Manager |
| ARM | Automatic Remote Mode |
| ARM | Arithmetic Relevance Matrix |
| ARM | Aeromedical Readiness Mission |
| ARM | Argentina Moneda Nacional (national currency since 1899; replaced by Ley 1970) |
| ARM | Automatic Route Management |
| ARM | Area Remote Multiplexer |
| ARM | Arc-Second Raster Map |
| ARM | Airborne Radio Maintenance |
| ARM | Aviation Resource Manager (USAF) |
| ARM | Aggregation and Refinement-based Modeling |
| ARM | Air Request Manager |
| ARM | Automated Re-Hosting Manager |
| ARM | American-Russian Matchmaking |
| ARM | Acronym Reference Manual |
| ARM | Accounting Record Modifier |
| ARM | Ammunition Requirement and Movement |
| ARM | Aircraft Restrictions Manual |
| ARM | Aviation Rockets & Missiles |
| ARM | Agency Resources Manager (insurance) |
| ARM | Antenna Restraint Mechanism |
| ARM | Afghanistan Reconstruction Movement |
| ARM | Auto Rétro Mosan (French; Belgian vintage car club) |
| ARM | Assisting Retired Missionaries |
| ARM | Acorn RISC (Reduced Instruction Set Computer) Machine (now ARM) |
| ARM | Alaska Retirement Management |
| ARM | Adult Role Model |
| ARM | ARM (not an acronym; originally Acorn RISC (Reduced Instruction Set Computer) Machine; computer architecture) |
| ARM | Australian Racing Museum |
| ARM | American Reverse Mortgage (loan) |