| QTL | Qualified Thrift Lender | 合格储蓄贷款人 |
| QTL | Quality Teaching and Learning (Centers for Quality Teaching and Learning; Raleigh, NC) | 优质教学（北卡罗来纳州罗利市优质教学中心） |
| QTL | Quality Through Leadership | 通过领导力实现质量 |
| QTL | True Heading (radiotelegraphy) | 真航向（无线电报） |
| QTL | Quality Teaching and Learning | 优质教学 |
| QTL | Quantitative Trait Loci | 数量性状位点 |
| QTL | Quencher Tether Ligand | 淬火系带配体 |
| QTL | Qualcomm Technology Licensing | 高通技术授权 |
| QTL | Quick Translation (Firefox add-on tool) | 快速翻译（Firefox附加工具） |
| QTL | What is your true heading ( true course with no wind)? | 你的真实航向是什么？ |
| QTL | Quicktime Link (file extension) | Quicktime链接（文件扩展名） |
| QTL | QuickTime Movie | QuickTime电影 |
| QTL | Quantitative Trait Locus | 数量性状位点 |
| QTL | Quincy and Torch Lake Railroad | 昆西和火炬湖铁路 |
| QTL | Qt Template Library | Qt模板库 |
| QTL | Quality Trait Locus | 质量性状位点 |
| QTL | Quantative Trait Loci | 数量性状位点 |