| Acronym | Meaning |
| GA | Billion Years Unit |
| TCAS-II | Traffic Alert And Collision Avoidance System |
| IUPAP | International Union Of Pure And Applied Physics |
| HF | High Frequency |
| CEA | Commissariat A |
| A/H | Air Handling |
| O-LAPS | LAPS Ported To The University Of Oklahoma To Support VORTEX |
| PRF | Pulse Repetition Frequency |
| SLW | Supercooled Liquid Water |
| AQSM | Air Quality Simulation Model |