| CTSO | Cryptologic Training Support Office (CNSG) | 密码培训支持办公室（CNSG） |
| CTSO | Center for Technological Support of Outreach | 外联技术支持中心 |
| CTSO | Cut That Stuff Out (polite form) | 把那些东西剪下来（礼貌的形式） |
| CTSO | Coordinating Tax Services Office | 协调税务服务办公室 |
| CTSO | Cellular Telephone Switching Office | 蜂窝电话交换局 |
| CTSO | Chief Technology and Services Officer | 首席技术和服务官 |
| CTSO | Catholic Tuition Support Organization | 天主教学费支持组织 |
| CTSO | Career Technical Sales Organization | 职业技术销售组织 |
| CTSO | Clinical Trials Support Office | 临床试验支持办公室 |
| CTSO | CaTthepSin O gene | CaTtheSin O基因 |
| CTSO | Cellular Telephone Service Order | 蜂窝电话服务订单 |
| CTSO | Chief Tactical Systems Officer | 首席战术系统官 |
| CTSO | Career and Technical Student Organizations | 职业和技术学生组织 |
| CTSO | Career and Technical Student Organization | 职业和技术学生组织 |