Aaron Ofori-Atta
(Aaron Ofori-Atta)

Adri K. Offenberg
(Adri Offenberg)

Alfonso Oficialdegui
(Alfonso Oficialdegui)

American Association of Collegiate Registrars and Admissions Officers
(American Officers)

Anglican Communion Office
(Anglican Office)

Ann O'Fallon
(Ann O'Fallon)

Architecture Research Office
(Architecture Office)

Armed Forces Radiobiology Research Institute Military Medical Operations Office
(Armed Office)

Avi Ofrane
(Avi Ofrane)

Bill O'Farrell
(Bill O'Farrell)