| Acronym | Definition |
|---|
| CNEN➣Comissão Nacional de Energia Nuclear (Portuguese: Nuclear Energy Commission) |
| CNEN➣Centre National d'Équipement Nucléaire (French: National Center of Nuclear Equipment) |
| CNEN➣Comitato Nazionale per l'Energia Nucleare (Italy) |
| CNEN➣Combined Nomenclature Explanatory Notes (tariffs; EU) |
| CNEN➣Comision Nacional de Energia Nuclear (Mexico) |