| Acronym | Meaning |
 | HMS | Helmet-mounted Display - Her Majesty's Ship (Royal Navy) |
| J2 | Joint Intelligence Directorate |
| OSI | Office Of Strategic Influence - Ontario Swine Improvement - Open Source Initiative - Open Systems Interconnection |
| RRS | Racing Rules Of Sailing |
| JPN | Japan (ISO 3166 Trigram) |
| TCAA | Top Counter-Assault Agents |
| BX | Base EXchange -Brunei (FIPS 10-4 Country Code) |
| NIAID | National Institute Of Allergies And Infectious Disease |
| OASIS | Ontario Association Of Sewage Industry Services |
| ASAP | As Soon As Possible |
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