| Acronym | Meaning |
 | SSM | Surface-to-Surface (Guided) Missile |
| PIR | Priority Intelligence Requirement |
| MLT | Maltese Language (ISO 639-2 Code) |
| HDRA | Henry Doubleday Research Association |
| RAP | Radio Access Point - Radiological Assistance Program (U.S. Department Of Energy) - Rear Area Protection - Recognised [Operating/Operational] Air Picture - Recurring Advance Payment - Relational Associative Processor - Reliable Acoustic Path - Rocket-Assis |
| AGA | AB Gas-accumulator (ah-gah |
| PAO | Public Affairs Officer |
| AQ | American Samoa (FIPS 10-4 Territory Code) - Antarctica (ISO 3166 Digram) |
| LUCA | Last Universal Common Ancestor |
| ICO | Intermediate Circular Orbit |
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