| Rank | Abbreviation | Meaning |
|---|
| ***** | OBPA | 10,10'-oxybisphenox-arsine
| |
| **** | OBPA | Office of Budget and Program Analysis
| |
| **** | OBPA | On-Base Percentage Against
| |
| **** | OBPA | Osterville Business and Professional Association
| |
| **** | OBPA | Oakdale Business and Professional Association
| |
| *** | OBPA | Office of Budget and Policy Analysis
| |
| *** | OBPA | Okolona Business and Professional Association
| |
| ** | OBPA | Office of Budget, Planning and Analysis
| |
| ** | OBPA | Outer Banks Preservation Association
| |
| ** | OBPA | Outer Banks Protection Act
| |
| ** | OBPA | Ogdensburg Bridge and Port Authority
| |
| ** | OBPA | Oakwood Band Parents Association
| |
| ** | OBPA | Ounces Back Pressure to Atmosphere
| |
| * | OBPA | On Board Parking Attendant
| |
| * | OBPA | Original Buying Power Adjustment
| |