| Acronym | Meaning |
 | OCO | Oort Cloud Object |
| CMBR | Cosmic Microwave Background Radiation |
| ACDA | Arms Control & Disarmament Agency |
| FISA | F?d?ration Internationale Des Soci?t?s D'Aviron (French |
| MMS | Multimission Modular Spacecraft |
| HRH | His (or Her) Royal Highness |
| BICS | Battlefield Information And Communication System |
| IDA | U.S. Institute For Defense Analyses - International Development Association (part Of The World Bank |
| TX | Texas (postal Symbol) - Transmit - Turkmenistan (FIPS 10-4 Country Code) |
| RIMVS | Retinal Imaging Machine Vision System |
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