| Acronym | Meaning |
| IEA | International Energy Agency |
| VSOP | Variations S?culaires Des Orbites Plan?taires (French |
| UK | Ukrainian Language (ISO 639-1 Code) |
| HEMP | High-Altitude Electromagnetic Pulse |
| LOTIS | Livermore Optical Transient Imaging System |
| CMBR | Cosmic Microwave Background Radiation |
| AY | Antarctica (FIPS 10-4 Territory Code) |
| ITER | International Thermonuclear Experimental Reactor |
| SLB | Solomon Islands (ISO 3166 Trigram) |
| CHE | Switzerland (ISO 3166 Trigram; From Latin Confoederatio Helvetica) |