| Acronym | Definition |
|---|
| OCCO➣Office of Commissioned Corps Operations |
| OCCO➣Oregon Coast Chamber Orchestra |
| OCCO➣Ohio Community Corrections Organization |
| OCCO➣Oklahoma Committee for Conscientious Objectors (Joy Mennonite Church; Oklahoma) |
| OCCO➣Ohio Council of County Officials |
| OCCO➣Online Clinical Communications for Ophthalmologists |