| Acronym | Definition |
|---|
| NMSI➣National Mobile Station Identification |
| NMSI➣National Museum of Science and Industry (London, UK) |
| NMSI➣New Mission Systems International (Fort Myers, FL) |
| NMSI➣National Mobile Station Identity |
| NMSI➣Northern Merchant Services, Inc. (also seen as NMS; Brasher Falls, NY) |
| NMSI➣Nebraska Math and Science Initiative (education) |
| NMSI➣Neighborhood Main Street Initiative (various locations) |