CCIN
| Acronym | Definition |
|---|---|
| CCIN | Castello Cities Internet Network (websites) |
| CCIN | Canadian Cryospheric Information Network |
| CCIN | Chronic Conditions Information Network |
| CCIN | Chernobyl Children in Need |
| CCIN | Custom Card Identification Number |
| CCIN | Conjunctival-Corneal Intraepithelial Neoplasia (ophthalmology) |