| CIAS | Canadian Immigration Assistance Services 
| Others |
| CIAS | Canadian International Air Show
| Others |
| CIAS | Canadian International Auto Show
| Others |
| CIAS | Cendant International Assignment Services
| Others |
| CIAS | Center for Information Assurance and Security
| Others |
| CIAS | Center for Infrastructure Assurance and Security
| Others |
| CIAS | Center for Integrated Agricultural Systems
| Others |
| CIAS | Central Iowa Architects Section
| Others |
| CIAS | Centre for International and Area Studies
| Others |
| CIAS | Certified Investor Agent Specialist
| Others |
| CIAS | Changi International Airport Services
| Others |
| CIAS | Charlotte International Auto Show
| Others |
| CIAS | Chinese Independent Auditing Standards
| Others |
| CIAS | Christian Institute of Arts and Sciences
| Others |
| CIAS | Christian Institute of Arts Sciences
| Others |
| CIAS | Columbus International Auto Show
| Others |
| CIAS | Connecticut International Auto Show
| Others |
| CIAS | Cornell International Affairs Society
| Others |
| CIAS | Costruttori Italiani Automobili Sportive
| Others |
| CIAS | Counter-Intelligence Analysis Section
| Others |
| CIAS | Crash Impact Absorbing Structure
| Others |