| Acronym | Meaning |
 | RFA | Restrictive Fire Area (military) - Royal Field Artillery |
| FIPS | Federal Information Processing Standard |
| PAO | Public Affairs Officer |
| HU | Hungarian Language (ISO 639-1 Code) |
| MAGTF | Marine Air-Ground Task Force |
| AZ | Arizona (postal Symbol) - Azerbaijan (ISO 3166 Digram) |
| SDO | Scattered Disc Object |
| MLL | Major League Lacrosse |
| IAUC | International Astronomical Union Circular |
| EPR | European Pressurised [Nuclear] Reactor |
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