| Acronym | Definition |
|---|
| ICSN➣Indo-China Steam Navigation Co. (shipping company) |
| ICSN➣Idaho Charter School Network |
| ICSN➣International Cancer Screening Network (National Cancer Institute) |
| ICSN➣International Center for Sports Nutrition (Omaha, NE) |
| ICSN➣International Conference on Survey Nonresponse (est. 1999) |
| ICSN➣International Contact Support Network (alien encounters) |