| OCCI | Oakland Car Club International 
| Others |
| OCCI | Ocean and Climate Change Institute
| Others |
| OCCI | Off Campus Clinical Instruction
| Others |
| OCCI | Office Code Compatibility Inspector
| Others |
| OCCI | Office of Cross College Initiatives
| Others |
| OCCI | OFS Credit Co Inc
| Others |
| OCCI | Oman Chamber of Commerce and Industry
| Others |
| OCCI | Online Civil Courage Initiative
| Others |
| OCCI | Ontario Case Costing Initiative
| Others |
| OCCI | Ontario Consortium for Cardiac Imaging
| Others |
| OCCI | Open Cloud Computing Interface
| Others |
| OCCI | Oracle C Call Interface
| Others |
| OCCI | Oracle C Plus Plus Call Interface
| Others |
| OCCI | Oracle C++ Call Interface
| Others |
| OCCI | Oregon Center for Clinical Investigations
| Others |
| OCCI | Oregon Coast Culinary Institute
| Others |
| OCCI | Organizational Change Consultants International
| Others |
| OCCI | Orthodox Christian Counseling Institute
| Others |
| OCCI | Osaka Chamber of Commerce & Industry
| Others |
| OCCI | Osaka Chamber of Commerce and Industry
| Others |