| CTOS | Convergent Technologies Operating System | 会聚技术操作系统 |
| CTOS | Computerized Tomography Operating System | 计算机化X线断层摄影术操作系统 |
| CTOS | Cerebellar Thoracic Outlet Syndrome | 小脑胸廓出口综合征 |
| CTOS | Connective Tissue Oncology Society | 结缔组织肿瘤学会 |
| CTOS | Corps Tactical Operations System | 陆军战术作战系统 |