| Acronym | Meaning |
 | USNOFS | U.S. Naval Observatory Flagstaff Station |
| ORD | Office Of Research And Development - Operational Requirements Document |
| NE | Neon |
| ERTS | Earth Resources Technology Satellite (became Landsat) |
| HIPAA | U.S. Health Insurance Portability And Accountability Act |
| NIMH | National Institute Of Medical Herbalists - National Institute Of Mental Health |
| RO | Romanian Language (ISO 639-1 Code) |
| NASDAQ | National Association Of Securities Dealers Automated Quotations (an American Stock Exchange). |
| PTAN | Precision Terrain Aided Navigation |
| HYE | Armenian Language (ISO 639-2 Code) |
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