| TDX | Tanadgusix Corporation | Tanadgusix公司 |
| TDX | Time Division Exchange | 时分交换 |
| TDX | Timken-Detroit Axle Company | 铁姆肯底特律车桥公司 |
| TDX | Time Domain (X) Crosstalk | 时域（X）串扰 |
| TDX | Tracking Dog Excellent (canine title) | 优秀追踪犬（犬名） |
| TDX | Tracking Dog Excellent | 追踪犬优秀 |
| TDX | Thermedics Detection, Inc. | Thermedics Detection公司。 |
| TDX | Test Design eXpert | 测试设计eXpert |
| TDX | Team Daiwa- X reel baitcaster | 团队大和-X卷轴诱饵 |
| TDX | TransDominion Express passenger train | TransDominion快速客运列车 |
| TDX | Tech Data Express | 技术数据快车 |
| TDX | Track Driver eXtra | 轨道驾驶员eXtra |