| HTL | Hack Tracking Log 
| Others |
| HTL | Hamilton Thorne Ltd
| Others |
| HTL | Handle Template Library
| Others |
| HTL | Harold Technical Labs
| Others |
| HTL | Haywood Tipton and Lauderdale
| Others |
| HTL | Head Tube Length
| Others |
| HTL | Healing the Land
| Others |
| HTL | Hearing Threshold Level
| Others |
| HTL | Heater Less
| Others |
| HTL | Heavy to Light
| Others |
| HTL | Heavy Tough Light
| Others |
| HTL | Heavy Trailer Long
| Others |
| HTL | Help Through Life
| Others |
| HTL | Hierarchical Temporal Logic
| Others |
| HTL | Hierarchical Timing Language
| Others |
| HTL | High Temperature Lubricant
| Others |
| HTL | High Threshold Level
| Others |
| HTL | High Threshold Logic
| Others |
| HTL | High Tide Level
| Others |
| HTL | High Transistor Logic
| Others |
| HTL | High-Threshold logic
| Others |
| HTL | Hind Tibia Length
| Others |
| HTL | Hindustan Teleprinters Limited
| Others |
| HTL | Hire Torque Ltd
| Others |
| HTL | Histogram Template Library
| Others |
| HTL | Hold The Line
| Others |
| HTL | Hole Transport Layer
| Others |
| HTL | Hole Transporting Layer
| Others |
| HTL | Homage To Leo
| Others |
| HTL | Honey Thickened Liquids
| Others |
| HTL | Hops To Live
| Others |
| HTL | Horizon Terminals Limited
| Others |
| HTL | Howay The Lads
| Others |
| HTL | HTML Template Language
| Others |
| HTL | HTML Template Library
| Others |
| HTL | Hurricane Test Laboratory
| Others |
| HTL | Hydraulics and Transmissions Ltd
| Others |
| HTL | Hydrothermal Liquefaction
| Others |
| HTL | Hyposensitive To Light
| Others |
| HTL | Hyrum Town Locos
| Others |