| MRS | Air Marshall Islands 
| Others |
| MRS | Macro Resource
| Others |
| MRS | Magnetic Resonance Spectroscopy
| Others |
| MRS | Magnetic Ride System
| Others |
| MRS | Main Ring Simulator
| Others |
| MRS | Make Roads Safe
| Others |
| MRS | Man Rogosa and Sharpe
| Others |
| MRS | Management Reporting System
| Others |
| MRS | Management Research Services
| Others |
| MRS | Management Review System
| Others |
| MRS | Manufacturers Railway (Anheuser-Busch)
| Others |
| MRS | Manufacturers Railway Company
| Others |
| MRS | Map Rating System
| Others |
| MRS | Marginal Rate of Substitution
| Others |
| MRS | Maria Rose and Stans
| Others |
| MRS | Market Research Society
| Others |
| MRS | Married Remarkable Sophisticated
| Others |
| MRS | Marseille, France
| Others |
| MRS | MASINT (Measurement And Signature INTelligence) Requirements System
| Others |
| MRS | Material Recovery System
| Others |
| MRS | Materials Research Society
| Others |
| MRS | Maximum Rolling Support
| Others |
| MRS | MCAT Registration System
| Others |
| MRS | Mechanical Release System
| Others |
| MRS | Media Recognition System
| Others |
| MRS | Medical Reception Station
| Others |
| MRS | Medical Rehabilitation Section
| Others |
| MRS | Medical Repair Service
| Others |
| MRS | Meet real soon
| Others |
| MRS | Megane Renault Sport
| Others |
| MRS | Meganuclease Recombination System
| Others |
| MRS | Mehrfach Ruckhalte System
| Others |
| MRS | Melkersson-Rosenthal Syndrome
| Others |
| MRS | Mentally Retarded Severe
| Others |
| MRS | Message Routing System
| Others |
| MRS | Metaphysical Research Society
| Others |
| MRS | Metastasis Research Society
| Others |
| MRS | Meteorological Radar Subsystem
| Others |
| MRS | Metering And Regulator Station
| Others |
| MRS | Methicillin resistant Staphylococcus
| Others |
| MRS | MI Rehabilitation Services
| Others |
| MRS | Michelle R Smith
| Others |
| MRS | Michigan Rehabilitation Services
| Others |
| MRS | Mid Roof Sleeper
| Others |
| MRS | Mid-Range Services
| Others |
| MRS | Midship Runabout Sports
| Others |
| MRS | Midwater Respirometry System
| Others |
| MRS | Military Reception Station
| Others |
| MRS | Military Road Switcher
| Others |
| MRS | Miniature Rawinsonde System
| Others |
| MRS | Minimal Recursive Semantics
| Others |
| MRS | Minimum Residual Stress
| Others |
| Mrs | Missus
| Others |
| MRS | Mister Right's Seamstress
| Others |
| Mrs | Mistress
| Others |
| MRS | Mitsubishi Rotary Separator
| Others |
| MRS | Mixed Race Sinner
| Others |
| MRS | Mobile Roof Support
| Others |
| MRs | Mobile Routers
| Others |
| MRS | Mobility Requirements Study
| Others |
| MRS | Mode Register Setting
| Others |
| MRS | Model Railway Society
| Others |
| MRS | Modified Rankin Scale
| Others |
| MRS | Modified Rankin Score
| Others |
| MRS | Molecular Recognition Section
| Others |
| MRS | Molitor Racing Systems
| Others |
| MRS | Monash Residential Services
| Others |
| MRS | Monitored Retrievable Storage
| Others |
| MRS | Monza Rally Show
| Others |
| MRS | Moron Rail Service
| Others |
| MRS | Moronic Retards Society
| Others |
| MRS | Most Requested Show
| Others |
| MRS | Motor Rotation Sensor
| Others |
| MRS | Mount Royal Soccer
| Others |
| MRS | Mountain Research Station
| Others |
| MRS | Movement Report System
| Others |
| MRS | Movie Recommendation System
| Others |
| MRS | Movimiento Radical Socialista
| Others |
| MRS | Mucus Recovery System
| Others |
| MRS | Multi Reflection Suppression
| Others |
| MRS | Multi Resource Scheduling
| Others |
| MRS | Multiple Restraint System
| Others |
| MRS | Multiple Roundpoint Structures
| Others |
| MRS | Music Radio Service
| Others |
| MRS | Music Recognition Service
| Others |
| MRS | Music Recording Service
| Others |
| MRS | Muslim Religious Service
| Others |
| MRS | Renfros Salsas
| Others |
| MRS | Renfros Salsass
| Others |
| MRS | WordPerfect Macro Resource file
| Others |
| Mrs. | Married woman
| Others |