| OSBA | Open Source Business Alliance | |
| OSBA | Ohio State Bar Association | |
| OSBA | Oregon School Boards Association | |
| OSBA | Ontario Senior Baseball Association | |
| OSBA | Oklahoma State Beekeepers Association | |
| OSBA | Oregon State Beekeepers Association | |
| OSBA | Ontario Scholastic Basketball Association | |
| OSBA | Ohio State Beekeepers Association | |
| OSBA | Ontario School Bus Association | |
| OSBA | Ontario Senior Baseball Association | |
| OSBA | Ontario Scholastic Basketball Association | |
| OSBA | Open Source Business Alliance | |
| OSBA | Office of Small Business Assistance | |
| OSBA | Ohio School Boards Association | |
| OSBA | Oregon School Boards Association | |
| OSBA | Open Service Broker for Azure | |
| OSBA | Office of Small Business Advocate | |
| OSBB | Oregon Small Business Boost | |
| OSBC | Office of the State Bank Commissioner | |
| OSBC | Ocean Shores Baptist Church | |
| OSBC | Ocean State Baptist Church | |
| OSBC | Ocean State Bird Club | |
| OSBC | Open Source Business Conference | |
| OSBC | Osun State Broadcasting Corporation | |
| OSBC | Odisha State Beverage Corporation |
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