| Acronym | Meaning |
| TC | Technetium |
| OCD | Obsessive-Compulsive Disorder |
| MDA | Main Defensive Action/Area -Moldova (ISO 3166 Trigram) - Muscular Dystrophy Association |
| C2IEDM OR C?IEDM | Command And Control Information Exchange Data Model |
| GWARS | Ground Warfare System (simulation) |
| XCBL | XML Common Business Library |
| FA | Field Artillery - Financial Aid - Football Association (England) |
| DEFCON | Defence Readiness Condition |
| PHL | Philippines (ISO 3166 Trigram) |
| NCL | New Caledonia (ISO 3166 Trigram) |