| R&M | Rapeseed & Mustard 
| Others |
| R&M | Refurbishment & Maintenance
| Others |
| R&M | Reliability and Maintainability
| Others |
| R&M | Repair and Maintenance
| Others |
| R&M | Rick and Morty
| Others |
| R&M | Routine and Manual
| Others |
| RM | Rabid Munk
| Others |
| RM | Race Modified
| Others |
| RM | Racial Matter
| Others |
| RM | Racing Machine
| Others |
| RM | Racing Midship
| Others |
| RM | Racing Model
| Others |
| RM | Rack Mountable
| Others |
| RM | Raden Mas
| Others |
| RM | Radiation Monitoring
| Others |
| RM | Radiation Myelopathy
| Others |
| RM | Radical Mastectomy
| Others |
| RM | Radical Mastoidectomy
| Others |
| RM | Radio Mountain
| Others |
| RM | Radioman
| Others |
| RM | Radius Matching
| Others |
| RM | Radon Monitor
| Others |
| RM | Raghead Muhammed
| Others |
| RM | Raghead Muhammedi
| Others |
| RM | Rail Me
| Others |
| RM | Random Map
| Others |
| RM | Random Migration
| Others |
| RM | Randy Morris
| Others |
| RM | Range Master
| Others |
| RM | Range of Movement
| Others |
| RM | Rap Monster
| Others |
| RM | Rap Mulletpic
| Others |
| RM | RapMom Malec
| Others |
| RM | Rashid Minhas
| Others |
| RM | Raster Manager
| Others |
| RM | Raw Material
| Others |
| RM | Raw Materials
| Others |
| RM | Read Mode
| Others |
| RM | Real Marines
| Others |
| RM | Real Me
| Others |
| RM | Real Media
| Others |
| RM | REAL MEpic
| Others |
| RM | Really Manly
| Others |
| RM | Recoltants Manipulants
| Others |
| RM | Reconfiguration Module
| Others |
| RM | Records Management
| Others |
| RM | Recovery Manager
| Others |
| RM | Recovery Mechanism
| Others |
| RM | Red Meat
| Others |
| RM | Red Mountain, Inc.
| Others |
| RM | Red Muscle
| Others |
| RM | Redemptive Movement
| Others |
| RM | redhotsonic and Module
| Others |
| RM | Reduction Mammaplasty
| Others |
| RM | Redundancy Management
| Others |
| RM | Reference Material
| Others |
| RM | Reference Materials
| Others |
| RM | Reference Method
| Others |
| RM | Reference Mission
| Others |
| RM | Refrigerator Mobile
| Others |
| RM | Region Manager
| Others |
| RM | Regional Manager
| Others |
| RM | Regional Meeting
| Others |
| RM | Regional Metastases
| Others |
| RM | Registered Mail
| Others |
| RM | Registered Midwife
| Others |
| RM | Reglement Mensuel
| Others |
| RM | Regular Matrix
| Others |
| RM | Rehabilitation Medicine
| Others |
| RM | ReichsMark (German national currency during and just before World War II)
| Others |
| RM | Reiki Master
| Others |
| RM | Reinhold Merkelbach
| Others |
| RM | Relationship Manager
| Others |
| RM | Reliability and Maintenance
| Others |
| RM | Relic Magnum
| Others |
| RM | Remix Mono
| Others |
| RM | Remote Manageability
| Others |
| RM | Remote Manipulator
| Others |
| RM | Remove Means
| Others |
| RM | Remove Monte
| Others |
| RM | Remy Martin
| Others |
| RM | Renaissance Man
| Others |
| RM | Render Monster
| Others |
| RM | Rendezvous Maneuver
| Others |
| RM | Rep Max
| Others |
| RM | Rep Maximum
| Others |
| RM | Repeat Maximum
| Others |
| RM | Repeated Miscarriage
| Others |
| RM | Repetition Maximum
| Others |
| RM | Repitition Maximum
| Others |
| RM | Repressor Maintenance
| Others |
| RM | Rescue Me
| Others |
| RM | Rescue Module
| Others |
| RM | Reserve Memory
| Others |
| RM | Resident Magistrate
| Others |
| RM | Residential Member
| Others |
| RM | Resort Manager
| Others |
| RM | Resource Management
| Others |
| RM | Resources module
| Others |
| RM | Respiratory Movement
| Others |
| RM | Respiratory Muscle
| Others |
| RM | Resting Metabolism
| Others |
| RM | Retail Margin
| Others |
| RM | Retained Mode
| Others |
| RM | Return Method
| Others |
| RM | Return Missionary
| Others |
| RM | Returned Missionary
| Others |
| RM | Returning Missionary
| Others |
| RM | rhabdomyolysis
| Others |
| RM | Rhaeto-Romance
| Others |
| RM | Rhinolophus Macrotis
| Others |
| RM | Rich Motherf
| Others |
| RM | Rich Motherf***er
| Others |
| RM | Rich Motherfvcker
| Others |
| RM | Rich Muller
| Others |
| RM | Richtmyer Meshkov
| Others |
| RM | Rick Moonen
| Others |
| RM | Rifle Marksmanship
| Others |
| RM | Right Mess
| Others |
| RM | Right Mid
| Others |
| RM | Rights Managed
| Others |
| RM | Riley McDonough
| Others |
| RM | Ringgit Malaysia
| Others |
| RM | Ringgit Malaysian
| Others |
| RM | Ringgit, Malaysia
| Others |
| RM | Risk Multiplier
| Others |
| RM | River Mile
| Others |
| RM | Rob Mullins
| Others |
| RM | Rob Myers
| Others |
| RM | Robbie Miranda
| Others |
| RM | Robert Mendralla
| Others |
| RM | Roger Mcguinn
| Others |
| RM | Role Model
| Others |
| RM | Roma (Provence)
| Others |
| RM | Roman Missal
| Others |
| RM | Rotation Measure
| Others |
| RM | Routemaster
| Others |
| RM | Roy Michael
| Others |
| RM | Royal Mail
| Others |
| RM | Royal Marine
| Others |
| RM | Royal Marines
| Others |
| RM | Royal Marsden
| Others |
| RM | Rugged Multi
| Others |
| RM | Rumah Makan
| Others |
| RM | Run Mode
| Others |
| RM | Running Man
| Others |
| RM | Ruote Motrici
| Others |
| RM | Ruptured Membrane
| Others |
| RM | Rural Municipality
| Others |