| Acronym | Definition |
|---|
| CISN➣California Integrated Seismic Network |
| CISN➣Collaborative Internet Security Network (CyberDefender Corp.) |
| CISN➣Community Integrated Service Network (health care provider system) |
| CISN➣Communications, Information Systems and Networks |
| CISN➣Comité Interministériel de la Sécurité Nucléaire (French: Interministerial Committee on Nuclear Safety) |
| CISN➣Computer Information Systems Networking (computing class) |
| CISN➣Computer Info Science-Network (computing class) |
| CISN➣Carrier Interactions and Spintronics in Nanostructures |
| CISN➣Computing and Information Services Newsletter |
| CISN➣Caribbean Information Sharing Network |
| CISN➣Cable Integrated Services Network |
| CISN➣Cal Independent Scholars Network (California) |
| CISN➣Communications Information, Systems, & Network(s) |
| CISN➣Communities in Schools of Newark, Inc. (New Jersey) |