| Acronym | Meaning |
 | TDR | Tracking And Data Relay |
| IFLOWS | Integrated Flood Observing And Warning System |
| ACB | Air-operated Circuit Breaker |
| URSI | International Union Of Radio Science |
| APPA | American Public Power Association |
| IASPEI | International Association Of Seismology And Physics Of The Earth's Interior |
| AGC | Automatic Gain Control |
| ADL | Alexandria Digital Library |
| AIV | Aviation-impact Variable |
| RAMS | Random Access Measurement System |
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