| Acronym | Meaning |
| ATSDR | Agency For Toxic Substances And Disease Registry |
| AAR | Afar Language (ISO 639-2 Code) |
| AC | Actinium |
| LAT | Lowest Astronomical Tide (nautical Charts) |
| ANGLICO | Air/Naval Gunfire Liaison Company |
| INR | Indian Rupee (ISO 4217 Currency Code) |
| AFR | Afrikaans Language (ISO 639-2 Code) |
| ICNAF | International Commission For The Northwest Atlantic Fisheries (became NAFO In 1978) |
| REACH | Registration |
| NOM | Novus Ordo Missae Or New Ordinary Of The Mass (sometimes Abbreviated To Simply NO) |