| Acronym | Meaning |
| IFR | Instrument Flight Rules |
| IASPEI | International Association Of Seismology And Physics Of The Earth's Interior |
| ATSR | Argonne Thermal Source Reactor |
| PIRAQ-III | PC-based Radar Acquisition ? 3rd Generation |
| MCC | Mesoscale Convective Complex |
| CARL | Colorado Alliance Of Research Libraries |
| EH | Assistant Secretary For Environment |
| ETS | Emergency Transponder System |
| ALSI | Aluminum Silicon Alloy |
| DDC | Defense Documentation Center |