| OSDA | Ontario Soft Drink Association | 安大略省软饮料协会 |
| OSDA | Old School Derby Association (skating) | 老学校德比协会（滑冰） |
| OSDA | Organization for Strategic Development for Africa | 非洲战略发展组织 |
| OSDA | Operator Services/Directory Assistance | 话务员服务/目录的援助 |
| OSDA | Oceanic System Development and Support | 海洋系统开发与支持 |