| Acronym | Meaning |
| UCS | Union Of Concerned Scientists |
| RTLS | Return To Launch Site - Period In NASA Space Shuttle Assent Profile Where |
| CME | Coronal Mass Ejection (usually Sun) |
| DVLC | UK Driver And Vehicle Licencing Centre |
| XL | EXtra Large -Forty (in Roman Numerals) |
| FCZ | Forward Combat Zone |
| PETE | PolyEthyleneTErephthalate |
| SPC | Secretariat Of The Pacific Community |
| LOS | Line Of Sight |
| MOM | Management Object Model (HLA) - Message Oriented Middleware |