| Acronym | Meaning |
 | IG | Inspector General |
| FSF | Free Software Foundation |
| POK | Plane Of Knowledge |
| NSS | (U.S.) Naval Simulation System |
| URD | User Requirements Document |
| GS | R -General Support-Reinforcing |
| WCS | Weapon Control Status - Wildlife Conservation Society |
| WMO | World Meteorological Organization |
| YH | Yoctohenry |
| HEER | High-Explosive Extended Range (ammunition) |
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