| Acronym | Definition |
|---|
| HHT | High Heat Transfer |
| HHT | Heavy Haul Truck |
| HHT | Historic Houses Trust (Australia) |
| HHT | Hereditary Hemorrhagic Telangiectasia (Osler-Rendu-Weber disease) |
| HHT | Hand Held Transceivers |
| HHT | Helen Hamlyn Trust (London; UK) |
| HHT | Headquarters Troop |
| HHT | Hand-Held Terminal |
| HHT | Hilbert-Huang Transform (signal decomposition) |
| HHT | House Hunting Trip |
| HHT | Heinrich Hertz Telescope |
| HHT | Headquarters & Headquarters Troop |
| HHT | Hand Held Technology |
| HHT | Hereditary Hemorrhagic Telangiectasia Foundation International |
| HHT | Halton Housing Trust (UK) |
| HHT | Household Towel |
| HHT | Helping Hand Trust |