| Abbreviation | Definition |
|---|---|
| MSF | Motorcycle Safety Foundation |
| MSI | Maritime Safety Information |
| MSIS | Marine Safety Information System |
| MSL | Mean Sea Level |
| MSMS | Marine Safety Management System |
| MSN | Dane County Regional Airport, Truax Field, Madison, Wisconsin |
| MSO | Marine Safety Office |
| MSP | Marine Security Program |
| MSP | Minneapolis - St Paul International Airport |
| MSPV | Minerva Special Purpose Vehicles |
| MSRTC | Maharashtra State Road Transport Corporation |
| MSS | Motor Surveillance Service |
| MSSVS | Multiple Station Shared Vehicle Systems |
| MST | Military Shipping Tag |
| MSTA | Municipal School Transportation Assistance |
| MSTAT | Marine Safety Training and Assistance Team |
| MSTI | Maine Summer Transportation Institute |
| MSTI | Mississippi Summer Transportation Institute |
| MSTM | Maryland Statewide Transportation Model |
| MSV | Maneuver Sustainment Vehicle |