| Acronym | Definition |
|---|
| HCCO➣HIPAA (Health Insurance Portability and Accountability Act) Conformance Certification Organization |
| HCCO➣Hwa Chong Chinese Orchestra |
| HCCO➣Humanist Community of Central Ohio (est. 1979; Columbus, OH) |
| HCCO➣Hunt Club Community Organization (Canada) |
| HCCO➣Harris County Constable's Office |
| HCCO➣Heavy Catalytic Cycle Oil |