| Acronym | Meaning |
| ISL | Icelandic Language (ISO 639-2 Code) |
| ETH | Ethiopia (ISO 3166 Trigram) |
| TRL | Technology Readiness Level |
| PGM | Precision-Guided Munition |
| TANP | Terrain-Aware Network Planner |
| HK | Hong Kong (ISO 3166 Digram; FIPS 10-4 Territory Code) |
| FONSI | Finding Of No Significant Impact |
| WXO | Weather [Executive] Officer |
| ULF | Ultra Low Frequency |
| PAFC | Plymouth Argyle Football Club |