| CISSA | Cairo International Schools Sports Association 
| Others |
| CISSA | Canadian Immigrant Settlement Sector Alliance
| Others |
| CISSA | Cayman Islands Security Services Association
| Others |
| CISSA | Centre for Innovation in Science and Social Action
| Others |
| CISSA | Centre for International Students and Study Abroad
| Others |
| CISSA | Centre for International Students Study Abroad
| Others |
| CISSA | Certified Information Systems Secuirty Auditor
| Others |
| CISSA | Certified Information Systems Security Auditor
| Others |
| CISSA | Committee of Intelligence and Security Services of Africa
| Others |
| CISSA | Communities In Schools of San Antonio
| Others |
| CISSA | Communities In Schools San Antonio
| Others |
| CISSA | Computing and Information Systems Students Association
| Others |
| CISSA | Conference on Imaging Science Systems and Applications
| Others |