| R.S.M. | Regimental Sergeant Major 
| Others |
| RSM | Rabid Space Monkey
| Others |
| RSM | Rabid Space Monkie
| Others |
| RSM | Radiant Silver Metallic
| Others |
| RSM | Radio Spectrum Management
| Others |
| RSM | Railroad Switching Service of Missouri
| Others |
| RSM | Railroad Switching Service of Missouri Incorporated
| Others |
| RSM | Rain Sensing Module
| Others |
| RSM | Rain Snow and Mud
| Others |
| RSM | Rain Snow Mud
| Others |
| RSM | Raj Sawh Martinez
| Others |
| RSM | Rancho Santa
| Others |
| RSM | Rancho Santa Margarita
| Others |
| RSM | Rankers Study Materials
| Others |
| RSM | Rate Setting Methodology
| Others |
| RSM | Rational Software Modeler
| Others |
| RSM | Ready Steady Mental
| Others |
| RSM | Real Sorority Moves
| Others |
| RSM | Realignment Solution Methodology
| Others |
| RSM | Really Simple Modeler
| Others |
| RSM | Really Slow Motion
| Others |
| RSM | Realtime Services Manager
| Others |
| RSM | Rear Seat Module
| Others |
| RSM | Received Sync Message
| Others |
| RSM | Recurrent Spontaneous Miscarriage
| Others |
| RSM | Refuge Student Ministry
| Others |
| RSM | Regional Sales Manager
| Others |
| RSM | Regional Security Manager
| Others |
| RSM | Regional Sediment Management
| Others |
| RSM | Regional Simulation Model
| Others |
| RSM | Regional Spectral Model
| Others |
| RSM | Regional Support Manager
| Others |
| RSM | Regional System Managers
| Others |
| RSM | Regulator of Secondary Metabolites
| Others |
| RSM | Reliability Service Maturity
| Others |
| RSM | Religious Sisters of Mercy
| Others |
| RSM | Remote Sensing Manual
| Others |
| RSM | Remote Shared Mem
| Others |
| RSM | Remote Shared Memory
| Others |
| RSM | Remote Socket Modules
| Others |
| RSM | Remote Speaker Microphone
| Others |
| RSM | Remote Switch Module
| Others |
| RSM | Removable Storage Management
| Others |
| RSM | Removable Storage Manager
| Others |
| RSM | Renault Samsung Motors
| Others |
| RSM | Rencontre Sportive Malagasy
| Others |
| RSM | Rencontres Sportives Malagasy
| Others |
| RSM | Repair Station Manual
| Others |
| RSM | Replication Solutions Manager
| Others |
| RSM | Repubblica di San Marino ( Republic Of San Marino)
| Others |
| RSM | Republic of San Marino
| Others |
| RSM | Requirements Specification Mappings
| Others |
| RSM | Resolute Support Mission
| Others |
| RSM | Resolute Symetrical Material
| Others |
| RSM | Resource Standard Metrics
| Others |
| RSM | Response Surface Method
| Others |
| RSM | Response Surface Methodology
| Others |
| RSM | Response Surface Methods
| Others |
| RSM | Restore Session Manager
| Others |
| RSM | Restriction Site Mutation
| Others |
| RSM | Result Set Management
| Others |
| RSM | Resume Switch
| Others |
| RSM | Retail Service Merchandiser
| Others |
| RSM | Revenox Sales Manager
| Others |
| RSM | Revenue Seat Miles
| Others |
| RSM | Reverse Seamless Manager
| Others |
| RSM | Revolution Speed Meter
| Others |
| RSM | RHESsys (Regional Hydro-Ecological Simulation System) Snow Model
| Others |
| RSM | Ride Some More
| Others |
| RSM | Ridiculously Sad Masturbators
| Others |
| RSM | Risk and Strategic Management
| Others |
| RSM | Road Safety Management
| Others |
| RSM | Road Safety Manual
| Others |
| RSM | Road Safety Matters
| Others |
| RSM | Road Safety Monitor
| Others |
| RSM | Roadside Medical
| Others |
| RSM | Robert S McNamara
| Others |
| RSM | Robust Security Network
| Others |
| RSM | Rock Solid Mates
| Others |
| RSM | Roller Skating Manufacturers
| Others |
| RSM | Rolling Slowdown Method
| Others |
| RSM | Rollover Sensing Module
| Others |
| RSM | Rooted Student Ministries
| Others |
| RSM | Rotation Space Management
| Others |
| RSM | Rotterdam School of Management
| Others |
| RSM | Route Switch Module
| Others |
| RSM | Rover Scout Motorsport
| Others |
| RSM | Royal School of Music
| Others |
| RSM | Royal Signals Medal
| Others |
| RSM | Royal Society of Medicine
| Others |
| RSM | Rubber Sealant Membrane
| Others |
| RSM | Ruger Safari Magnum
| Others |
| RSM | Russian School of Math
| Others |
| RSM | Russian School of Mathematics
| Others |
| RSM | Sisters of Mercy
| Others |