| Acronym | Meaning |
| FI | F?d?ration ?questre Internationale (French International Federation For Equestrian Sports) |
| FSE | Fire Support Element |
| FITS | Flexible Image Transport System |
| F.K.A. OR F/K/A | Formerly Known As |
| ORD | O'hare International Airport In Chicago |
| THAAD | Theatre High Altitude Area Defence |
| PLM | Polarized Light Microscope/Microscopy |
| CF | Californium |
| DIV | Dhivehi Language (ISO 639-2 Code) |
| IMRI | Industrial Membrane Research Institute - Information Management Research Institute - Institut Pour Le Management De La Recherche Et De L?innovation (French |