CSNI
| Acronym | Definition |
|---|---|
| CSNI | Committee on the Safety of Nuclear Installations |
| CSNI | Czech Standards Institute |
| CSNI | Communications Systems Network Interoperability |
| CSNI | Central Suffolk and North Ipswich (county constituency; UK) |
| CSNI | Cancer Services of Northeast Indiana (Fort Wayne, IN) |
| CSNI | Consolidated Secret Network Infrastructure (Canada) |
| CSNI | Careers Service Northern Ireland (Department for Employment and Learning; UK) |