| Acronym | Meaning |
| NTS | Nevada Test Site |
| DOAS | Differential Optical Absorption Spectroscopy |
| NEXAIR | Next Generation Upper Air System |
| IRIS | Italian Research Interim Stage |
| INPA | Instituto Nacional De Pesquisas Da Amazonia |
| SLAC | Stanford Linear Accelerator Center (or Collider) |
| GAO | General Accounting Office |
| SPC | Storm Prediction Center |
| SME | Solar Mesosphere Explorer |
| OAO | Office Of Aircraft Operations |