| CISA | C4i Integration Support Activity 
| Others |
| CISA | California International Sailing Association
| Others |
| CISA | Cambridge International Studies Association
| Others |
| CISA | Canadian Institute for the Study of Antisemitism
| Others |
| CISA | Carolinas Integrated Sciences and Assessments
| Others |
| CISA | Carolinas Integrated Sciences Assessments
| Others |
| CISA | Casting Industry Suppliers Association
| Others |
| CISA | Catholic Information Service for Africa
| Others |
| CISA | Center for Information Security and Assurance
| Others |
| CISA | Central Illinois Service Access
| Others |
| CISA | Centre for Intelligent Systems And
| Others |
| CISA | Certified Information System Auditor
| Others |
| CISA | Certified Information Systems Auditor
| Others |
| CISA | Certified Information Sytems Auditor
| Others |
| CISA | China Iron & Steel Association
| Others |
| CISA | China Iron and Steel Association
| Others |
| CISA | Clinical Immunization Safety Assessment
| Others |
| CISA | College of International Security Affairs
| Others |
| CISA | Committee on International Scientific Affairs
| Others |
| CISA | Community Information Strategies Australia
| Others |
| CISA | Community Involved In Sustaining Agriculture
| Others |
| CISA | Computational Intelligence and Signal Analysis
| Others |
| CISA | Computer and Information Science Association
| Others |
| CISA | Consumers for Internet Safety Awareness
| Others |
| CISA | Corporate Investment Strategic Alliance
| Others |
| CISA | Council of International Students Australia
| Others |
| CISA | Crossroads In the Study of the Americas
| Others |
| CISA | Cyber Intelligence Security Agency
| Others |
| CISA | Cybersecurity and Infrastructure Security Agency
| Agency, Intelligence Agency, Internet, Security |
| CISA | Cybersecurity Information Sharing Act
| Others |