| Acronym | Definition |
|---|
| ICSA | Institute of Chartered Secretaries and Administrators (London, England, UK) |
| ICSA | International Computer Security Association |
| ICSA | International Cultic Studies Association |
| ICSA | International Customer Service Association |
| ICSA | Intercollegiate Sailing Association |
| ICSA | International Community School of Abidjan (Abidjan, Ivory Coast) |
| ICSA | International Chain Salon Association |
| ICSA | International Conference on Sustainable Agriculture for Food, Energy and Industry |
| ICSA | Internet Cellular Smart Access |
| ICSA | Internet Content Safety Association |
| ICSA | International Committee Against Apartheid, Racism and Colonialism in Southern Africa (South Africa) |
| ICSA | Irish Cattle & Sheep Farmers' Association (UK) |
| ICSA | Inductively-Coupled Slot Antenna |
| ICSA | Indonesian Customer Satisfaction Awards |
| ICSA | International Conference on Systolic Arrays |