C2S2 Center for Circuits and System Solutions (Carnegie Mellon College of Engineering) 为中心的电路及系统解决方案的卡内基·梅隆大学(工程)

C3 Colorectal Cancer Coalition (Alexandria, Virginia) 结直肠癌联盟(亚历山大,维吉尼亚州)

C3I Command, Control, Communications & Intelligence (US DoD) 指挥、控制、通信与智力(美国国防部)

C4 Composition 4 (explosive) 4(炸药成分)

C4I Command, Control, Communications, Computers, & Intelligence (US DoD) 指挥、控制、通讯、计算机、及智力(美国国防部)

C4IM Command, Control, Communications, Computers, and Information Management 指挥、控制、通信、计算机和信息管理

C4ISR Command, Control, Communications, Computers, Intelligence, Surveillance, and Reconnaissance 指挥、控制、通讯、计算机、智力、监控、侦察

C5 Class 5 第5课

C7 Cervical Vertebra 7 颈椎7

CA Computer Associates International Inc. 计算机联合国际公司

CA/MSAW Conflict Alert/Minimum Safe Altitude Warning 冲突的最小安全高度警觉或警告

CAA Creative Artists Agency 创造力的艺术家

CAAA Clean Air Act Amendments of 1990 1990年洁净空气法修正案

CAAD California Association for Adult Development 对于成人发展。加利福尼亚协会

CAAS Cruise Agent Accreditation Scheme (PSARA; United Kingdom) PSARA巡航代理评鉴制度(英国)

CAASD Center for Advanced Aviation System Development (MITRE) 先进航空系统发展中心(冠冕)

CAAT Computer-Assisted Audit Technique 计算机辅助审计技术

CAB Cabinet (Microsoft Windows file extension) 内阁(Microsoft Windows文件扩展名)

CABG Coronary Artery Bypass Graft 冠状动脉旁路搭桥术

CAC Center for Advanced Communications (Villanova University) 先进的通讯中心地区大学()