OAB may stand for:
- Order of Attorneys of Brazil (Ordem dos Advogados do Brasil), the Brazilian Bar Association
- The Oxford Annotated Bible
- Oita Asahi Broadcasting, a television company in Japan
- Oman Arab Bank, a bank in Oman
- Overactive bladder, a urological syndrome
- Oriental Air Bridge, airline
This disambiguation page lists articles associated with the title OAB.
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