| Acronym | Meaning |
 | RN | Kirundi Language (ISO 639-1 Code) |
| MACHO | MAssive Compact Halo Object |
| NAAWS | NATO Anti-Air Warfare System |
| NF | Norfolk Island (ISO 3166 Digram) |
| MEZ | Missile Engagement Zone |
| MAQS | Museum Of The American Quilter's Society (max) |
| PNF | Pilot Not Flying (aviation) |
| FRAGO | Fragmentary Order (military) |
| MOU | Memorandum Of Understanding |
| PCN | Pitcairn Islands (ISO 3166 Trigram) |
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