| Acronym | Meaning |
 | HM | Heard Island And McDonald Islands (ISO 3166 Digram; FIPS 10-4 Territory Code) |
| BMNT | Begin Morning Nautical Twilight |
| CHIPS | Cosmic Hot Interstellar Plasma Spectrometer |
| ELSS | Emergency Life Support Stores |
| SVC | Secondary Visual Cortex |
| PIR | Priority Intelligence Requirement |
| TMA | Terminal Manoeuvring Area (restricted Flying Zone) |
| ADAP | AIDS Drug Assistance Program |
| NRC | National Research Council (U.S.) - Nuclear Regulatory Commission (U.S.) |
| IA | Iowa (postal Symbol) |
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