| Acronym | Definition |
|---|
| CISAC | Center for International Security and Cooperation |
| CISAC | Center for International Security and Arms Control |
| CISAC | Confédération Internationale des Sociétés d'Auteurs et de Compositeurs (French: International Confederation of Societies of Authors and Composers) |
| CISAC | Centre for Information Security and Cryptography (University of Calgary, Canada) |
| CISAC | Counterintelligence Special Agent Course |
| CISAC | Connecticut Independent School Athletic Conference |
| CISAC | College Information Systems Advisory Committee |
| CISAC | Collecting Societies of Authors and Composers |