| Acronym | Meaning |
 | DF | Direct Fire - Direction Finding |
| ADI | Acceptable/Allowable Daily Intake |
| IDA | U.S. Institute For Defense Analyses - International Development Association (part Of The World Bank |
| PU | Plutonium |
| IIE | Innovative Interstellar Explorer |
| AAAI | American Association For Artificial Intelligence |
| TMS | Transcranial Magnetic Stimulation |
| ITN | Independent Television News (British) |
| OSI | Office Of Strategic Influence - Ontario Swine Improvement - Open Source Initiative - Open Systems Interconnection |
| NAA | N-Acetylaspartate |
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