| Acronym | Meaning |
| AAN | American Academy Of Nursing |
| BEL | Belgium (ISO 3166 Trigram) |
| SSG | Guided Missile Submarine (retired US Navy Hull Classification) |
| IAQ | Indoor Air Quality - Infrequently Asked Questions |
| DCCP | Datagram Congestion Control Protocol |
| FIR | Final Inspection Report |
| ESV | Engineer Support Vehicle |
| USEC | United States Enrichment Corporation |
| SJ | Svalbard And Jan Mayen (ISO 3166 Digram) -Societas Iesu (Latin: The Society Of Jesus |
| ARE | UK Admiralty Research Establishment (?1991) -United Arab Emirates (ISO 3166 Trigram) |