RM
- AEC Routemaster
- China Railways RM
- Congressional Research Service Report
- MR (disambiguation)
- Madagascar
- Magnetic Reynolds number
- Malaysian ringgit
- Marshall Islands
- Metropolitan City of Rome Capital
- Moldova
- Molière radius
- One rep maximum
- Province of Rome
- RM (musician)
- RM Education
- RM Sotheby's
- RM postal area
- Radioman
- Rail Motor
- Raksha Mantri
- Ranch to Market Road
- Random map
- Range of motion
- Rapid manufacturing
- RauteMusik.FM
- Real Madrid C.F.
- RealMedia
- Reasoning Mind
- Records management
- Recurrent miscarriage
- Regenerative medicine
- Regia Marina
- Regional municipality
- Reichsmark
- Reiki
- Relational model
- Relationship marketing
- Republic of Macedonia
- Reset Mode (ANSI)
- Resident magistrate
- Resource Management
- Respiratory physiology
- Returned Missionary
- Reuters Messaging
- Revenue management
- Rhabdomyolysis
- Rhesus macaque
- Rhinitis medicamentosa
- Richard Montgomery High School
- Richmond, Virginia
- Right midfielder
- Risk management
- Rocky Mount, North Carolina
- Roland Mouret
- Romania
- Romansh language
- Rosmah Mansor
- Royal Marines
- Running Man (TV program)
- Rural municipality
- Récoltant-Manipulant
- SJ Rm
- Santiago Metropolitan Region
- The R.M.
- Urinalysis