| Acronym | Meaning |
| SCN | Suprachiasmatic Nucleus |
| AFIS | Automated Fingerprint Identification System - American Forces Information Service |
| IUSS | Integrated Undersea Surveillance System - Integrated Unit Simulation System - International Union Of Soil Science |
| OVC | Overcast (METAR Code) |
| NS | Nanosiemens |
| LHC | Large Hadron Collider |
| NAVEUR | Naval Forces U.S. European Command |
| AWE | Advanced Warfighting Experiment |
| USD(P&R) | (U.S.) Under-Secretary Of Defense (Personnel & Readiness) |
| ISAF | International Sailing Federation - International Security Assistance Force |