OBA

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Oba or OBA may refer to:

Science, technology, business, management

Office Business Applications, software which uses applications within the Microsoft Office system
On base average, a baseball statistic
Online Behavioral Advertising, a range of technologies and techniques used by online website publishers and advertisers
Optical Brightening Agent, a type of dye used in fabric and paper
Output-based aid, a type of aid to support the delivery of public services in developing countries
Out-of-band agreement, in communications
Oxygen Breathing Apparatus, an oxygen supply system used by the US Navy for firefighting

Oklahoma Bible Academy, a Christian secondary institution in Enid, Oklahoma, U.S.
Oklahoma Bankers Association, a trade association in Oklahoma, U.S.
Oklahoma Bar Association, the state bar (legal association) of Oklahoma, U.S.
One Bermuda Alliance, a Bermuda political party
Only Boys Aloud, Welsh male voice choir
Ontario Bar Association
Openbare Bibliotheek Amsterdam, the public library of Amsterdam
Ormiston Bolingbroke Academy, a school in Runcorn, England

Oba, Ontario a remote hamlet in Ontario, Canada
Oba Island, in Vanuatu
Oba-Igbomina, a town in Nigeria
Oba, Anambra, a town in Anambra State, Nigeria
Oba River, a river in Nigeria
Orange Beach, Alabama
Oba, Indonesia - that part of the administered area of the town of Tidore lying on Halmahera Island
Oba Market, Historical market at Ring Road in Edo State, Nigeria

Oba: The Last Samurai, a 2011 Japanese film
Oba (orisha), a spirit who is prominent in various Traditional African religions and Afro-American religions