| CIRCA | Conceptual Information Retrieval And Communication Architecture | 概念信息检索与通信体系结构 |
| CIRCA | Communication And Information Resource Centre Administrator | 通信和信息资源中心管理员 |
| CIRCA | Clandestine Insurgent Rebel Clown Army | 秘密反叛者小丑军 |
| CIRCA | Canadian Industries Recycling Coal Ash | 加拿大工业回收煤灰 |
| CIRCA | Center for Instructional and Research Computing Activities | 教学和研究计算活动中心 |
| CIRCA | Cambridge Interdisciplinary Research Centre on Ageing | 剑桥老龄问题跨学科研究中心 |
| CIRCA | Centre for Interdisciplinary Research in Computational Algebra | 计算代数跨学科研究中心 |
| CIRCA | Computer Interactive Reminiscence and Conversation Aid | 计算机交互式提醒和对话辅助 |
| CIRCA | Communication & Information Resource Centre Administrator | 通讯和信息资源中心管理人 |
| CIRCA | Cooperative Intelligent Real-Time Control Architecture | 协同智能实时控制体系结构 |
| CIRCA | Cisco Incident Response Communication Arena | Cisco事件响应通信竞技场 |
| CIRCA | Communication Information Resource Centre Administrator | 通信信息资源中心管理员 |
| CIRCA | Computer Incident Response Coordination Austria | 计算机事件响应协调（奥地利） |