| CIIS | Client Integration Implementation Service | 客户端集成实施服务 |
| CIIS | Center for Integrated Intelligence Systems | 综合情报系统中心 |
| CIIS | Compatibility, Interoperability, Integration and C4 Supportability | 兼容性、互操作性、集成性和C4支持性 |
| CIIS | Controlled Items Inventory System | 受控物品库存系统 |
| CIIS | Comprehensive-Interactive Information Strategy | 综合交互式信息战略 |
| CIIS | California Institute of Integral Studies | 加州整合学院 |