| Acronym | Meaning |
 | TKM | Turkmenistan (ISO 3166 Trigram) |
| ASBL | Association Sans But Lucratif (French Non-profit Organisation) |
| USN | United States Navy |
| ARDA | Advanced Research And Development Activity (became DTO 2006) |
| EHF | Extremely High Frequency |
| SEAFDEC | Southeast Asian Fisheries Development Center |
| FHFIF | Foster's Home For Imaginary Friends |
| IHH | Idiopathic Hypogonadotropic Hypogonadism |
| MLLW | Mean Lower Low Water (nautical Charts) |
| TTO | Trinidad And Tobago (ISO 3166 Trigram) |
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