FSX
| Acronym | Definition |
|---|---|
| FSX | Flight Simulator X |
| FSX | File System Xml |
| FSX | Financial Services Exchange |
| FSX | Full Scale Exercise |
| FSX | Fantasy Stock Exchange (Facebook application) |
| FSX | Fighter Support Experimental (Japanese military technology) |
| FSX | Fire Support Execution |
| FSX | Ferrous Sulphate Xylenol Orange |