| HTL | High Threshold Logic | 高临界值逻辑 |
| HTL | Hearing Threshold Level | 听力阀值水平 |
| HTL | High-Threshold logic | 高阈值逻辑 |
| HTL | human tear lysozyme | 人泪液溶菌酶 |
| HTL | human t-cell leukemia | 人t细胞白血病 |
| HTL | human t-cell lymphoma | 人类t细胞淋巴瘤 |
| HTL | Hops To Live | 活下去的希望 |
| HTL | Heartland Partners, L. P. | Heartland Partners有限公司。 |
| HTL | Harold Technical Labs | 哈罗德技术实验室 |
| HTL | Hack Tracking Log | 黑客跟踪日志 |
| HTL | Heat Transfer Label | 传热标签 |
| HTL | Hazard Tracking Log | 危险跟踪日志 |
| HTL | Heat Transfer Loop | 传热回路 |
| HTL | Hole Transport Layer | 空穴传输层 |
| HTL | Horizon Terminals Limited | 地平线码头有限公司 |
| HTL | Höhere Technische Lehranstalt (Austria) | Höhere Technische Lehranstalt (Austria) |
| HTL | Histology Technologist | 组织学技术专家 |
| HTL | Host Target LUN (VMware) | 主机目标LUN(VMware) |
| HTL | Host Technical Liaison | 主办技术联络 |
| HTL | Henri de Toulouse-Lautrec (painter) | 亨利·德·图卢兹·劳特里克(画家) |
| HTL | Hops to Live (Freenet) | 希望生活(自由网) |
| HTL | Hot Tub Lung | 热浴肺病 |
| HTL | Heat Transfer Laboratory | 传热实验室 |
| HTL | Hydrothermal Processing | 水热处理 |
| HTL | House of Traditional Leaders | 传统领袖之家 |
| HTL | Hypotrichosis, Localized, Autosomal Recessive | 毛发减少症,局限性,常染色体隐性 |
| HTL | Höhere Technische Lehranstalt (Technical collage) | Höhere Technische Lehranstalt (Technical collage) |