| TCOS | Tactical Combat Operations System | 战术作战系统 |
| TCOS | Telesec Chipcard Operating System | Telesec芯片卡操作系统 |
| TCOS | Traveling Class Of Service | 旅行服务等级 |
| TCOS | Traction Control Override Switch | 牵引力控制超越开关 |
| TCOS | The Chronicles of Spellborn (game) | 斯皮尔伯恩编年史（游戏） |
| TCOS | The Caves of Steel (novel) | 钢铁洞穴（小说） |
| TCOS | Team Communication and Organization System | 团队沟通与组织体系 |
| TCOS | Technical Committee on Operating Systems | 操作系统技术委员会 |