| Acronym | Definition |
|---|
| CISA | Certified Information Systems Auditor |
| CISA | Cybersecurity and Infrastructure Security Agency (US DHS) |
| CISA | Cybersecurity Information Sharing Act of 2015 |
| CISA | Community Information Strategies Australia |
| CISA | Certified Information Security Auditor |
| CISA | Computer Information Systems Administration (Canada) |
| CISA | Center for India and South Asia (University of California, Los Angeles) |
| CISA | China Iron & Steel Association |
| CISA | Casting Industry Suppliers Association |
| CISA | Consejo Indio de Sudamérica (Spanish) |
| CISA | Consejo Indio de Sudamérica (Indian Council of South America) |
| CISA | Criminal Intelligence Service Alberta |
| CISA | C4I Integration Support Activity |
| CISA | Cultura Inglesa SA (Portugese; English culture; Brazil) |
| CISA | Center for International Security Affairs |
| CISA | Command Information Superiority Architectures (formerly C4ISR Integrated Architecture Program, CIAP) |
| CISA | Centre Interfacultaire en Sciences Affectives (French: Interfaculty Center for Affective Sciences; Switzerland) |
| CISA | Commission Internationale de Secours Alpin (French) |
| CISA | Centro de Información Socio Ambiental (Spanish: Socio-Environmental Information Center; Puerto Cabezas, Nicaragua) |
| CISA | Centre for Institutional Support in Africa |
| CISA | Criminal Intelligence Service Austria |
| CISA | Central de Inversiones SA (Spanish) |
| CISA | Club Informatique Saint Avertinois (French: Saint Avertin Computer Club; Saint Avertin, France) |
| CISA | Countably-Infinite Source Alphabet |
| CISA | Coalition Information Sharing Architecture |