| CIOS | Channel Island Occupation Society (Channel Islands) | 海峡群岛职业协会（海峡群岛） |
| CIOS | Uluslararasi Bilimsel Organizasyon Konseyi | 胆红素有机物 |
| CIOS | Claim Imaging Operation Services (insurance) | 理赔成像运营服务（保险） |
| CIOS | Communication Institute for Online Scholarship | 网络奖学金传播学院 |
| CIOS | Central Imaging Operation Services | 中央成像运营服务 |