Acronym |
Definition |
| OORTSF | Object-Oriented Real Time Software Foundation |
| OOUG | Ottawa Oracle User Group |
| OOUG | Ohio Oracle Users Group |
| OPA | Oil Producers Association |
| OPA | Ohio Psychological Association |
| OPA | Oklahoma Psychological Association |
| OPA | Oregon Pilots Association |
| OPA | Oregon Psychological Association |
| OPA | Ohio Pawnbrokers Association |
| OPC | Ontario Press Council |
| OPCEA | Ontario Pollution Control Equipment Association |
| OPCMIA | Operative Plasterers and Cement Masons International Association of the United States and Canada |
| OPCS | Organisation de la Patrouille Canadienne de Ski |
| OPD | Online Professional Development |
| OPEC | Organization of the Petroleum Exporting Countries |
| OPEI | Outdoor Power Equipment Institute |
| OPFA | Ontario Professional Foresters' Association |
| OPLC | Oklahoma Prevention Leadership Committee |
| OPLF | Ohio Preservation Loan Fund |
| OPLM | Office of Publications and Logistics Management |
| OPPA | Ohio Promotional Products Association |
| OPS | Ophthalmic Photographers' Society |
| OPSA | Association for Office Professionals of South Africa |
| OPSC | Osteopathic Physicians and Surgeons of California |
| OPSM | Optical Prescription Spectacle Makers |
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