MR
- .mr
- Air Mauritanie
- Chief Maqoma Regiment
- M.R. (automobile)
- MR (Marina and Rainer)
- Magnetic resonance (disambiguation)
- Magnetic resonance imaging
- Magnetoresistance
- Magyar Rádió
- Marathi language
- Martin Research
- Martinique
- Master of Laws
- Master of the Rolls
- Mauritania
- McCune–Reischauer
- Mendelian randomization
- Menntaskólinn í Reykjavík
- Mental retardation
- Merge request
- Meta Runner
- Midland Railway
- Millirem
- Mineral Resources
- Mineralocorticoid receptor
- Mister (disambiguation)
- Mitral regurgitation
- Mixed reality
- Model Railroader
- Modified release
- Molecular replacement
- Morocco
- Mouvement Réformateur
- Mouvement radical
- Mr.
- Mr. (band)
- Nissan MR engine
- Rear mid-engine, rear-wheel-drive layout
- Relative molecular mass