| Acronym | Meaning |
| CIR | Corotating Interaction Region |
| SNCB | Soci?t? Nationale Des Chemins De Fer Belgique (French For Belgian Railways National Society) |
| BTI | Bacillus Thuringiensis Israelensis |
| SVD | Singular Value Decomposition - Snaiperskaya Vintovka Dragunova (??????????? ???????? ????????? |
| CCTT | Close Combat Tactical Trainer |
| LIT | Lithuanian Language (ISO 639-2 Code) |
| XRML | EXtensible Rights Markup Language |
| PID | Pelvic Inflammatory Disease -Plan Identification Number - Positive Identification - Procedural Identification -Procurement Identification Description |
| IGS | International Ground Station |
| MSLP | Mean Sea Level Pressure |