OPPI
| Acronym | Definition |
|---|---|
| OPPI | Ontario Professional Planners Institute |
| OPPI | Organisation of Pharmaceutical Producers of India |
| OPPI | Oficina del Procurador de las Personas con Impedimentos (Spanish: Office for People with Disabilities) |
| OPPI | Owners Protective Professional Indemnity (insurance) |
| OPPI | Office of Policy, Planning and Information |
| OPPI | Office of Petroleum Price Information (Natural Resources Canada) |
| OPPI | Oracle Portal Partner Initiative (Oracle Corporation) |