| Acronym | Meaning |
 | MSO | Multiple System Operator |
| AAR | Afar Language (ISO 639-2 Code) |
| SASE | Self-Addressed Stamped Envelope |
| FCM | Federation Of Canadian Municipalities - Fogarty's Cove Music |
| MBCC | Migratory Bird Conservation Commission (U.S.) |
| RF | Radio Frequency - Receptive Field (neurophysiology) |
| ASPI | Australian Strategic Policy Institute |
| RFE | Request For Enhancement |
| MA | Master Of Arts -Madagascar (FIPS 10-4 Country Code) - Massachusetts (postal Symbol) - Megaampere - Morocco (ISO 3166 Digram) |
| FO | Faroe Islands (ISO 3166 Digram; FIPS 10-4 Territory Code) -Force Operations (military) - Forward Observer - Frame Optional (military Symbology) |
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