| Acronym | Definition |
|---|
| THI | Texas Heart Institute (Houston, TX) |
| THI | Tissue Harmonic Imaging (signal processing technique) |
| THI | Tim Hortons, Inc. (various locations) |
| THI | Townscape Heritage Initiative (UK grant program) |
| THI | The Hood Internet (music production group) |
| THI | The Heartland Institute (est. 1984; think tank) |
| THI | Temperature Humidity Index |
| THI | Teledyne Hastings Instruments (Hampton, VA) |
| THI | Traumatic Head Injury |
| THI | The Humane Interface (Jef Raskin book) |
| THI | The Hispanic Institute (Washington, DC) |
| THI | Torrey Honors Institute (Biola University) |
| THI | Taeknihaskoli Islands (Technical University of Iceland; Reykjavik, Iceland) |
| THI | Traffic Homicide Investigator (Law Enforcement) |
| THI | Target Hazard Index |