| Acronym | Meaning |
 | MISSI | Multilevel Information System Security Initiative |
| OC | Observer/Controller |
| OPTAR | Operational Target |
| QFE | Quoted For Emphasis -Local Ground Level Atmospheric Pressure (aeronautical Q Code) |
| DQ | Dairy Queen -Jarvis Island (FIPS 10-4 Country Code) |
| CA | California (postal Symbol) - Canada (FIPS 10-4 Country Code; ISO 3166 Digram) - Catalonia -Civil Affairs - Close Armour - Computer Associates - Counter-Air |
| IZ | Iraq (FIPS 10-4 Country Code) |
| MMEV | Multi-Mission Effects Vehicle |
| OJI | Anishinaabe Language (Ojibwa) (ISO 639-2 Code) |
| GAAR | General Anti-Avoidance Rule (tax Evasion) |
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