| Acronym | Meaning |
| TTFN | Ta Ta For Now |
| UNRISD | United Nations Research Institute For Social Development |
| JE | Jersey (FIPS 10-4 Territory Code) |
| GPL | General Public License |
| SLPS | Standard Litre Per Second (air Flow) |
| CZE | Czech Republic (ISO 3166 Trigram) |
| RISTA | Reconnaissance |
| OFA | Occipital Face Area |
| MDA | Main Defensive Action/Area -Moldova (ISO 3166 Trigram) - Muscular Dystrophy Association |
| 4D | Four-dimensional (usually Three Spatial Plus One Temporal Dimension |