| Acronym | Meaning |
![](file.png) | MRB | Materials Review Board |
![](file.png) | MRF | Medium-Range Forecast |
![](file.png) | MRF | Meteorological Rocket Facility |
![](file.png) | MRI | Meteorological Research |
![](file.png) | MRI | Meteorological Research Institute |
![](file.png) | MRI | Minority Research Initiation |
![](file.png) | MRI | Mesoscale Research Initiative |
![](file.png) | MRIR | Medium Resolution Infrared Radiometer |
![](file.png) | MRIS | Media Relations & Information Services |
![](file.png) | MRN | Meteorological Rocket Network |
![](file.png) | MRS | Mesoscale Research Section |
![](file.png) | MS | MASnet Code For The Mass Storage System |
![](file.png) | MS | The Company Microsoft |
![](file.png) | MSC | Manned Spaceflight Center |
![](file.png) | MSCP | Mass Store Control Processor |
![](file.png) | MSD | Mass Storage Device |
![](file.png) | MSDOS | Microsoft Disk Operating System |
![](file.png) | MSE | Mean Square Error |
![](file.png) | MSF | Magnetic Flux Structures |
![](file.png) | MSFC | Marshall Space Flight Center |
![](file.png) | MSFE | Mechanisms Of Soil Formation And Evolution |
![](file.png) | MSI | Measurements |
![](file.png) | MSI | Maximum Strategy |
![](file.png) | MSIS | Mass Spectrometer And Incoherent Scatter |
![](file.png) | MSISR | Millstone Hill Incoherent Scatter Radar |
![](file.png) | MSL | Mean Sea Level |
![](file.png) | MSLP | Mean Sea-level Pressure |
![](file.png) | MSOCC | Multisatellite Operations Control Center |
![](file.png) | MSP | Minneapolis |
![](file.png) | MSS | Multi-spectral Scanner |
![](file.png) | MSS | Mass Storage System |
![](file.png) | MST | Mesospheric/stratospheric/tropospheric |
![](file.png) | MSU | Microwave Sounding Unit |
![](file.png) | MSU | Mass Storage Unit |
![](file.png) | MT | Magnetic Tape |
![](file.png) | MTA | Message Transfer Agent |
![](file.png) | MTBF | Mean Time Between Failure |
![](file.png) | MTC | Main Trunk Circuit |
![](file.png) | MTEM | Magnetosphere-Thermosphere Explorer Mission |
![](file.png) | MTF | Mississippi Test Facility |
![](file.png) | MTI | Moving Target Indicator |
![](file.png) | MTL | Message Transfer Layer |
![](file.png) | MTM | Mechanical Test Model |
![](file.png) | MTTF | Mean Time To Failure |
![](file.png) | MTTR | Mean Time To Repair |
![](file.png) | MUG | McIDAS Users Group |
![](file.png) | MUSE | Monitor Of Ultraviolet Solar Energy |
![](file.png) | MVS | Multiple Virtual Storage |
![](file.png) | MVS/XA | Multiple Virtual Systems/Extended Architecture |
![](file.png) | MW | Microwave |