CPN
- Calpine Corporation
- Carnivorous Plant Newsletter
- Carpinteria (Amtrak station)
- Caspian Airlines
- Celiac plexus neurolysis
- Central Park North (disambiguation)
- Central Pattana
- Chlamydia pneumoniae
- Citizen Potawatomi Nation
- Clapham North tube station
- Coloured Petri net
- Communist Party of Nepal
- Communist Party of the Netherlands
- Community protection notice
- Community psychiatric nurse
- Complex projective space
- Confederation of the Polish Nobility
- Country and Progressive National Party
- Lysine carboxypeptidase