| Acronym | Meaning |
| APS | American Physical Society |
| VRMS OR VRMS | Volt Root Mean Square |
| AAA | American Arbitration Association |
| PCM | Parallel Climate Model |
| GAT | General Aviation Transponder |
| PAIR | Particulate Airborne Inlet Research |
| ECA | Earth-crossing Asteroids |
| TASI | Time-assingment Speech Interpolation |
| CB | Meteorological Symbol |
| STRADAP | Storm Radar Data Processor |