| Acronym | Meaning |
| DCG | Derived Air Concentration Guide For Uncontrolled Areas |
| STF | Short-Term Forecast |
| AOG | Augmented Offgas |
| ICWG | International Coordinating Working Group |
| FX-ALPHA | FSL X-window AWIPS-Like Prototype For Hydrometeorological Applications |
| MPDATA | Multidimensional Positive Definite Advection Algorithm |
| MSU | Microwave Sounding Unit |
| IRD | Instrument Requirement Document |
| NRE | Notice Of Revised Estimate |
| OTS | Office Of Technical Services |