| Acronym | Meaning |
| SDN | Sudan (ISO 3166 Trigram) |
| BDO | Battle Dress Overgarment |
| DDT | Dichloro-Diphenyl-Trichloroethane (insecticide) - Dynamic Debugging Tool (computing) |
| CHRS | Canadian Heart Rhythm Society |
| POTS | Plain Old Telephone Service (cf. PANS) - Postural Orthostatic Tachycardia Syndrome |
| UFO | Unidentified Flying Object - United Farmers Of Ontario |
| ARCENT | United States Army Central Command |
| DSCS | U.S. Defense Satellite Communications System |
| CG | Client Group - Computer Graphics -Democratic Republic Of The Congo (FIPS 10-4 Country Code) - Republic Of The Congo (ISO 3166 Digram) |
| MF | Mayotte (FIPS 10-4 Territory Code) - Megafarad |