| Acronym | Meaning |
 | C2 OR C? | Command And Control |
| PIRA | Provisional Irish Republican Army |
| TACCSF | U.S. Theater Aerospace Command & Control Simulation Facility |
| NOPA | National Office Products Alliance - National Office Products Association |
| AFOSR | U.S. Air Force Office Of Scientific Research |
| INMARSAT | International Maritime Satellite Organization |
| MX | Mail Exchange -Mexico (FIPS 10-4 Country Code; ISO 3166 Digram) -Missile EXperimental |
| AF | Afghanistan (FIPS 10-4 Country Code; ISO 3166 Digram) -Air Force |
| FACA | (US) Federal Advisory Committee Act |
| NSDAP | Nationalsozialistische Deutsche Arbeiterpartei (German: German National Socialist Workers Party |
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