| Acronym | Definition |
|---|
| MSSO➣Mean Squared Soft Output |
| MSSO➣Maintenance and Support Services Organization |
| MSSO➣Multiple Source Simple Output |
| MSSO➣Munich Symphonic Sound Orchestra |
| MSSO➣MILSATCOM Systems Sustainment Office |
| MSSO➣Multi-Stage Self-Organizing |
| MSSO➣Mission Services and Support Office |