sort by Rank | Alpha
| Possible Meanings | Rank |
| Office of Funding and Program Assistance | ** |
| Order of Founders and Patriots of America | ** |
| Oregon Forest Practices Act | ** |
| Oregon Foster Parent Association | ** |
| Ozark Food Processors Association | * |
| Options Floor Procedure Advice | * |
| Office of Forecast and Policy Analysis | * |
| Organic Foods Protection Act | * |
| Office of Forecasting and Policy Analysis | * |