Acronym |
Definition |
| OIRSA | Organismo Internacional Regional de Sanidad Agropecuaria |
| OKA | Ontario Kinesiology Association |
| OKTA | Overseas Korean Traders Associations |
| OLBPA | Old Louisville Business and Professional Association |
| OLCA | Ohio Lawn Care Association |
| OLGA | Old Ladies Golf Association |
| OLS | Ontario Land Surveyor |
| OMCI | Ohio Metal Casting Industry |
| OMEA | Ontario Music Educators' Association |
| OMEA | Ontario Music Educators Association |
| OMEP | Oregon Manufacturing Extension Partnership |
| OMFED | OSC (Orissa State Cooperative) Milk Producers' Federation Limited |
| OMIC | Ophthalmic Mutual Insurance Company |
| OMLA | Oregon Mortgage Lenders Association |
| OMM | Organizacion Mundial de Medicina Natural |
| OMMA | Ottawa Mixed Media Artists |
| OMU | Offshore Mariners United |
| ONA | Ontario Nurses' Association |
| ONA | Oregon Nurses Association |
| ONAY | Onayi |
| ONEA | Oregon Narcotics Enforcement Association |
| ONS | Oncology Nursing Society |
| OOA | Ohio Osteopathic Association |
| OOA | Ohio Optometric Association |
| OOJ | Out Of Job |
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