| TMCS | Trimethylchlorosilane (derivatization reagent) | 三甲基氯硅烷（衍生化试剂） |
| TMCS | Telecommunications Management & Control Subsystem | 电信管理及控制系统 |
| TMCS | TicketMaster Online City | TicketMaster在线城市 |
| TMCS | Taylor Made Computer Solutions, Ltd. | Taylor Made Computer Solutions有限公司。 |
| TMCS | Teleport Management and Control System (military communications) | 电信管理和控制系统（军事通信） |
| TMCS | Senior Chief Torpedoman (naval rating) | 高级首席鱼雷兵（海军等级） |