| Acronym | Meaning |
 | OPLE | Omega Position Location Equipment |
| DDHS | Digital Data Handling System |
| GMD | Geometric Mean Diameter |
| USDC | United States Department Of Commerce |
| QC | Quality Control |
| OU | University Of Oklahoma |
| DROT | Direct Read Out Terminal |
| ALAPCO | Association Of Local Air Pollution Control Officials |
| RFI | Radio Frequency Interference |
| NNT | Nearest Neighbor Tool |
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