sort by Rank | Alpha
| Possible Meanings | Rank |
|---|
| Object Based Storage System | **** |
| Oxford Book of Short Stories | *** |
| Operations and Business Support System | *** |
| Office of Business and Support Services | *** |
| optimal blood sampling schedule | ** |
| Orbiter Boom Sensory System | ** |
| Ocean Bottom Seismic System | ** |
| Ocean Bottom Seismic Station | ** |
| Orbiter Booster Sensor System | ** |
| On Board Sales System | ** |
| Orbitor Boom Sensor System | ** |
| Orbital Boom Sensor System | ** |
| Outward Bound School of Singapore | ** |
| Office of Black Student Services | * |
| Ordo Byzantinus Sancti Sepulchri | * |
| Orbiter Boom Survey System | * |
| Otto Bock Seating System | * |
| Object Based Support System | * |
| Origins Billions Star Survey | * |
| Office of Business System Services | * |