- CAPN stands for Calpain
- CAPN stands for Commission Administrative Paritaire Nationale (French: National Joint Administrative Committee; education system; France)
- CAPN stands for Child Abuse Prevention Network (est. 1995; Life Network Engineering Technologies, Inc.)
- CAPN stands for Computer Automated Practical Navigator
- CAPN stands for Chemotherapy-Associated Peripheral Neuropathy (cancer)
- CAPN stands for Customer Account Profile Number
CAPN