| Acronym | Meaning |
| MPI | Max Planck Institute |
| ICFD | Institute For Computational Fluid Dynamics |
| NMC | National Meteorological Center |
| USTAR | UCAR Scientist's Technical Areas Of Research |
| ALJ | Administrative Law Judge |
| AER | Average Evoked Response |
| NEDRES | National Environmental Data Referral System |
| UAO | Upper Atmosphere Observatory |
| NEIC | National Earthquake Information Center |
| PD | Positive Definite |