| Acronym | Meaning |
 | OS | Osmium |
| CSA | Canadian Space Agency - Canadian Standards Association - Child Support Agency - Command Staff Advisor - Community-supported Agriculture - Confederate States Of America - Corps Storage Area -Czech Airlines |
| EDA | European Defence Agency |
| DODAF | U.S. Department Of Defense Architectural Framework |
| AOC | Air Operations Centre |
| TCD | Chad (ISO 3166 Trigram) |
| SE | Seychelles (FIPS 10-4 Country Code) - South-East - Sweden (ISO 3166 Digram) -Synthetic Environment - System Engineering |
| VE | Venda Language (ISO 639-1 Code) |
| AFYA | Anything To Fool Young Andy. Acronym That's Real Meaning Is Hidden. |
| GRC | Greece (ISO 3166 Trigram) |
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