| Acronym | Meaning |
| ZAMS | Zero Age Main Sequence |
| HJD | Heliocentric Julian Day |
| NIAMD | National Institute Of Arthritis And Musculoskeletal Diseases |
| FPS | Fire Prevention System - First Person Shooter (computer/video Games) |
| MIRA | MILAN Infra-Red Acquisition (thermal Sight) |
| RSTA | Reconnaissance |
| MPSOC | MultiProcessor System-on-Chip |
| CGS | Chief Of The General Staff |
| PIRA | Provisional Irish Republican Army |
| HN | Honduras (ISO 3166 Digram) |