| 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) |