| ICSA | Infant Car Seat Adapter 
| Others |
| ICSA | Institute of Chartered Secretaries & Administrators
| Others |
| ICSA | Institute of Chartered Secretaries and Administrators
| Others |
| ICSA | Institute of Singapore Chartered Accountants
| Others |
| ICSA | Intercollegiate Chinese for Social Action
| Others |
| ICSA | International Centre for Security Analysis
| Others |
| ICSA | International Chinese Statistical Association
| Others |
| ICSA | International Communal Studies Association
| Others |
| ICSA | International Community School of Abidjan
| Others |
| ICSA | International Computer Security Association
| Others |
| ICSA | International Council of Securities Associations
| Others |
| ICSA | International Cultic Studies Association
| Others |
| ICSA | International Customer Service Association
| Others |
| ICSA | International Cyber Security Academy
| Others |
| ICSA | Internet Cellular Smart Access
| Others |