| CAAC | C axis aligned crystalline 
| Others |
| CAAC | Canche Authie Auto Club
| Others |
| CAAC | Capital Area Activities Conference
| Others |
| CAAC | Catholic Arts and Academic Competition
| Others |
| CAAC | Centre for Augmentative and Alternative Communication
| Others |
| CAAC | Centro Andaluz de
| Others |
| CAAC | Certified Approver Advisory Committee
| Others |
| CAAC | Charlotte Amateur Astronomers Club
| Others |
| CAAC | Charlotte Area Activity Center
| Others |
| CAAC | Chickasha Antique Auto Club
| Others |
| CAAC | Children and Armed Conflict
| Others |
| CAAC | China Air Always Cancelled
| Others |
| CAAC | China Airlines Always Cancels
| Others |
| CAAC | China Airways Always Crashes
| Others |
| CAAC | Citizens Accessibility Advisory Committee
| Others |
| CAAC | Civil Aviation Administration of China
| Others |
| CAAC | Civilian Agency Acquisition Council
| Others |
| CAAC | Classic American Auto Club
| Others |
| CAAC | Clean Air Alliance of China
| Others |
| CAAC | Clover Area Assistance Center
| Others |
| CAAC | Clube Automovel Antiguo e Classico
| Others |
| CAAC | Columbus Area Aquatic Center
| Others |
| CAAC | COMMON Americas Advisory Council
| Others |
| CAAC | Compliance Assistance Advisory Committee
| Others |
| CAAC | Consultant Advisory Appointment Committee
| Others |
| CAAC | Contemporary African Art Collection
| Others |
| CAAC | Convenience Automatic Air Conditioning
| Others |
| CAAC | Cool As A Cucumber
| Others |
| CAAC | Coronary Artery Anomalies Center
| Others |
| CAAC | Cyclic Alkyl Amino Carbene
| Others |