| Acronym | Meaning |
 | HORIZON | H?licopt?re D'observation Radar Et D'investigation Sur Zone (French |
| YC | Yottacoulomb |
| OSS | Office Of Strategic Services (1942?1945 |
| TSN | Tswana Language (ISO 639-2 Code) |
| A | Atto |
| DF OR DF | lectricit? De France (French |
| USD(P) | (U.S.) Under-Secretary Of Defense (Policy) |
| SRS | Savannah River Site |
| NN | Nanonewton |
| GNAS | Grand National Archery Society |
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