| Acronym | Meaning |
| FCO | UK Foreign And Commonwealth Office |
| AFSCN | U.S. Air Force Satellite Control Network |
| BN | Brunei (ISO 3166 Digram; FIPS 10-4 Country Code) |
| YJ | Yoctojoule |
| CCSK | Cyclic Code Shift Keying |
| MAGIC | Major Atmospheric Gamma-ray Imaging Cherenkov (telescope) |
| BOI | Balance Of Investment - Basis Of Issue |
| MSD | Minimum Safe Distance |
| LYD | Libyan Dinar (ISO 4217 Currency Code) |
| PA 6 | Nylon 6 (PolyAmide) (similarly For PA 11 |