| Acronym | Meaning |
 | LRAD | Long Range Acoustic Device (ell-rad) |
| HOT | Highly Optimised Tolerance |
| FOH | Front Of House |
| HND | Honduras (ISO 3166 Trigram) |
| WWJD | What Would Jesus Do? (see WWWD) |
| ATN | Dronning Maud Land (ISO 3166 Trigram; Merged With AQ In 1983) |
| PI | PolyImide - PolyIsoprene - Private Investigator |
| MSR | Main Supply Route - Module Service Record -Montserrat (ISO 3166 Trigram) -Motor Schlepp Regulung |
| GDL | Game Definition Language |
| NCES | U.S. National Center For Education Statistics - Net-Centric Enterprise Services |
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