| CSIA | California Ski Industry Association 
| Others |
| CSIA | California Southwestern Insurance Agency
| Others |
| CSIA | Canadian Ski Instructors Alliance
| Others |
| CSIA | Canadian Ski Instructors' Alliance
| Others |
| CSIA | Central States Insulation Association
| Others |
| CSiA | Centre for Studies in Aging
| Others |
| CSIA | Centro Studi Indipendente Per l'Autoriparazione
| Others |
| CSIA | Certified Securities and Investment Analyst
| Others |
| CSIA | Certified Securities And Investment Analysts
| Others |
| CSIA | Certified Securities Investment Advisor
| Others |
| CSIA | Chemical Safety Improvement Act
| Others |
| CSIA | Chemical Safety Improvement Act of 2013
| Others |
| CSIA | Chengdu Shuangliu International Airport
| Others |
| CSIA | Chhatrapati Shivaji International Airport (India)
| Others |
| CSIA | Chimney Safety Institute of America
| Others |
| CSIA | China Software Industry Association
| Others |
| CSIA | Club Sport Injection with Automatic Transmission
| Others |
| CSIA | Colorado Software and Internet Association
| Others |
| CSIA | Columbus Spanish Immersion Academy
| Others |
| CSIA | Communications Security Information Assurance
| Others |
| CSIA | Community Services Industry Alliance
| Others |
| CSIA | Compound Specific Isotope Analysis
| Others |
| CSIA | Computer Security And Information Assurance
| Others |
| CSIA | Computer Software Industry Association
| Others |
| CSIA | Control System Integrators Association
| Others |
| CSIA | Customer Service Institute of America
| Others |
| CSIA | Customer Service Institute of Australia
| Others |
| CSIA | Cyber Security and Information Assurance
| Others |
| CSIA | Cyber Security Industry Alliance
| Others |
| CSIA | Cyber Space and Intelligence Association
| Others |