| Acronym | Meaning |
 | PCN | Pitcairn Islands (ISO 3166 Trigram) |
| AGARDOGRAPH | Advanced Guidance For Alliance Research And Development Publication |
| JDEM | Joint Dark Energy Mission |
| TGK | Tajik Language (ISO 639-2 Code) |
| TSN | Tswana Language (ISO 639-2 Code) |
| WPK | Wider Peacekeeping |
| EMO | Emergency Measures Organisation-Emotional |
| YTD | Year-To-Date |
| APHIS | Animal And Plant Health Inspection Service |
| IPCC | Intergovernmental Panel On Climate Change |
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