| Acronym | Definition |
|---|
| HTL | Hotel |
| HTL | Hospitality, Tourism and Leisure |
| HTL | Hard Thermal Loop (physics) |
| HTL | Hierarchical Timing Language |
| HTL | Hierarchical Temporal Logic |
| HTL | Histogram Template Library |
| HTL | High Tide Line |
| HTL | Horizon Terminals Limited |
| HTL | Hole Transport Layer |
| HTL | Höhere Technische Lehranstalt (Technical collage) |
| HTL | Höhere Technische Lehranstalt (Austria) |
| HTL | Hearing Threshold Level |
| HTL | Harison Toshiba Lighting (Japan) |
| HTL | High Threshold Logic |
| HTL | Histology Technologist |
| HTL | Howay the Lads |
| HTL | Henri de Toulouse-Lautrec (painter) |
| HTL | Heat Transfer Label |
| HTL | Hops to Live (Freenet) |
| HTL | Heat Transfer Laboratory |
| HTL | Heat Transfer Loop |
| HTL | House of Traditional Leaders |
| HTL | Hot Tub Lung |
| HTL | Hydrothermal Processing |
| HTL | Hazard Tracking Log |
| HTL | Host Target LUN (VMware) |
| HTL | Host Technical Liaison |
| HTL | Half Truck Load |
| HTL | Hypotrichosis, Localized, Autosomal Recessive |
| HTL | Henderson Technical Laboratory (Titanium Metals Corp.) |