| Acronym | Definition |
|---|
| OBSA➣Obligation à Bon de Souscription d'Action (French: Bond Purchase Underwriting Agenda) |
| OBSA➣Office of Black Student Affairs |
| OBSA➣Outward Bound South Africa (est. 1992) |
| OBSA➣Ontario Billiards and Snooker Association (Canada) |
| OBSA➣Observatory of Sustainability in Aviation (Spain; est. 2007) |
| OBSA➣Off-Balance Sheet Activity |
| OBSA➣Off-Balance Sheet Arrangement |