| Acronym | Meaning |
 | SN | Tin (Latin Stannum) |
| USNH | United States Naval Hospital |
| CDA | UK Centre For Defence Analysis |
| AUSCANZUKUS | Australia |
| FONSI | Finding Of No Significant Impact |
| DCIMS | Dental Classification Information Management System - Dismounted Combat Identification Marking System |
| BTIS | Battlefield Target Identification System |
| NCA | National Command Authority |
| AU | African Union (was OAU Before 2000) - American University -Astronomical Unit - Australia (ISO 3166 Digram) - Austria (FIPS 10-4 Country Code) |
| NOS | Network Operating System - New Old Stock (Internet Auction/trading Listings) - Nitric Oxide Synthase (enzyme) |
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