| Acronym | Definition |
|---|
| RM | Room |
| RM | Ream |
| RM | Royal Mail |
| RM | Risk Management |
| RM | Resource Management |
| RM | Records Management |
| RM | Rack Mount |
| RM | Resource Manager |
| RM | Real Madrid (Spanish soccer club) |
| RM | River Mile |
| RM | Rocky Mountain(s) |
| RM | Marshall Islands |
| RM | Rural Municipality |
| RM | Relationship Manager |
| RM | Reference Material |
| RM | Remember Me |
| RM | Rocky Mount (Virginia, USA) |
| RM | Remote Monitoring |
| RM | Revenue Management |
| RM | Regional Manager |
| RM | Reference Model |
| RM | Reference Model (Telcordia) |
| RM | Raw Material |
| RM | Royal Marines (British) |
| RM | Remake (gaming) |
| RM | Rule Making |
| RM | Romford (postcode, United Kingdom) |
| RM | Requirements Management |
| RM | Ricky Martin (Latin music artist) |
| RM | Repetition Maximum |
| RM | Ringgit Malaysia (Malaysian Ringgit) |
| RM | Rockman (video game) |
| RM | Remove Command (Unix) |
| RM | Reichsmark (German Marks until 1945) |
| RM | RPG Maker (utility program) |
| RM | Risk Mitigation |
| RM | Red Maple |
| RM | Real McCoy (music artist) |
| RM | Reiki Master |
| RM | Roxy Music (band) |
| RM | Reference Monitor |
| RM | Répertoire des Métiers (French: Trade Index) |
| RM | Radioman (USN Rating) |
| RM | Registered Midwife |
| RM | Release Management (Sprint) |
| RM | Research Method |
| RM | Relational Model |
| RM | Release Mechanism |
| RM | Reliability Maintainability |
| RM | Rocket Motor |
| RM | Randy Moss (NFL player) |
| RM | Radical Mastectomy |
| RM | Remy Ma (music artist) |
| RM | Red Music (band) |
| RM | Reset Mode |
| RM | Roma - Rome (Lazio, Italy) |
| RM | Radio Modem |
| RM | Rigor Mortis (medical) |
| RM | Rice Mill |
| RM | Rey Mysterio (pro-wrestler) |
| RM | Remington Magnum |
| RM | Recovery Mechanism |
| RM | Rate Monotonic |
| RM | Return Material |
| RM | Radiation Monitor(ing) |
| RM | Research Module |
| RM | Regulated Market |
| RM | Returned Missionary |
| RM | Repair Most |
| RM | Remote Manipulator |
| RM | Reed-Muller (coding algorithm) |
| RM | Ring Master |
| RM | Remote Module |
| RM | Research Machines plc (UK) |
| RM | Russian Mafia |
| RM | Richtmyer-Meshkov |
| RM | Route Master (type of UK bus) |
| RM | Record Mark |
| RM | Reactive Maintenance (reliability) |
| RM | Raphe Magnus |
| RM | Reba McIntyre (country music singer/actor) |
| RM | Requirements Manager |
| RM | Registration Manager (SIF) |
| RM | Restriction of Movement |
| RM | Reflective Memory |
| RM | Results Manager |
| RM | Respiratory Movement |
| RM | Règlement Mensuel |
| RM | Resources Monitor |
| RM | Red Mage (Final Fantasy game) |
| RM | Relay Master (USDAA dog agility title) |
| RM | Redundancy Management (Telcordia) |
| RM | Register Mark |
| RM | Rapid Mix (water treatment) |
| RM | Repetitive Manufacturing |
| RM | Residence Manager |
| RM | Reeling Machine |
| RM | Roy Mustang (military general in Fullmetal alchemist) |
| RM | Retrieval Mode |
| rm | Intrinsic rate of natural increase |
| RM | Radiant Mercury |
| RM | Reagent Mix |
| RM | Registered Microbiologist |
| RM | Replaceable Module |
| RM | Resource Management Bureau |
| RM | Ranch-to-Market road (Texas) |
| Rm | Mission Reliability |
| RM | Radar Mile |
| RM | Rathe Mountains (Everquest) |
| RM | Rescue Module |
| RM | Remote Multiplexer |
| RM | Rocky Maivia (WWE wrestler) |
| RM | Retrieval Manager |
| RM | Repulsion Motor |
| RM | Redstone Mercury |
| RM | Reconfiguration Management |
| RM | Robocon Magazine (Japan) |
| RM | Refueling Machine |
| RM | Rupiz Media (marketing solution provider) |
| RM | Rant Media (Counterculture media network) |
| RM | Réponse Mineure (French) |
| RM | Rohbaumaß |
| RM | Reservas Militares (Spanish, Guatemala) |
| RM | US Embossed Revenue Stamped Paper (Scott Catalogue prefix; philately) |
| RM | Rand McFarland, Company |
| RM | Directorate for Resource Management |
| RM | Riegos Modernos (Guatemala) |
| RM | RealMedia audiovisual file (file extension; RealNetworks) |
| RM | Requiring Manager |
| RM | Right Midboard |
| RM | Right-Arm Medium (cricket) |
| RM | Regretful Morning (website) |
| RM | Removable Media (various companies) |