Oba
Oba ma ọ bụ OBA nwere ike na-arutu ihe ndị a aka:

 Oba (eze), aha ndi Bini na Yoruba na-akpọ ụfọdụ ndị eze ha
 Oba (orisha), mmụọ a ma ama n'okpukpe ọdịnala Africa dị iche iche na okpukpe Afro-America.
 Oba, aha nna Japan
 Oba: Samurai Ikpeazụ, ihe nkiri Japanese nke 2011
 Oba Chandler (1946 – 2011), onye America n'egbu mmadụ, e gburu na 2011

OBA 

 Office Business Applications, ngwa ọrụ nke na-eji ngwa n'ime sistemụ Microsoft Office
 Oklahoma Bible Academy, ụlọ akwụkwọ sekọndrị nke Ndị Kraịst na Enid, Oklahoma, US
 Oklahoma Bankers Association, otu azụmaahịa na Oklahoma, US
 Oklahoma Bar Association, otu ndi ọka iwu steeti (òtù iwu) nke Oklahoma, US
 On Base Average, ọnụ ọgụgụ baseball
 Otu Bermuda Alliance, otu ndọrọ ndọrọ ọchịchị Bermuda
 Naanị ụmụ nwoke na-ada ụda, ndị Welsh nwoke olu ukwe
 Openbare Bibliotheek Amsterdam, ọbá akwụkwọ ọha nke Amsterdam
 Optical Brightening Agent, ụdị ihe eji esiji ákwà na akwụkwọ
 Out of Bound Agreement, na nkwukọrịta
 Output-based Aid, ụdị enyemaka iji kwado nnyefe nke ọrụ ọha na eze na mba ndị ka na-emepe emepe
 Oxygen Breathing Apparatus, sistemu ikuku oxygen nke ndị agha mmiri US na-eji maka mgbanyụ ọkụ
 Online Behavioural Advertising, teknụzụ na usoro dị iche iche nke ndị na-ebipụta weebụsaịtị na ndị mgbasa ozi na-eji.

Ebe 

 Oba, Ontario bụ obodo dịpụrụ adịpụ na Ontario, Canada
 Oba Island, Vanuatu
 Oba-Igbomina, obodo di na Naijiria
 Oba, Anambra, obodo di na Anambra Steeti, Naijiria
 Osimiri Oba, osimiri na Naijiria
 Orange Beach, Alabama
 Oba, Indonesia - akụkụ nke mpaghara a na-achịkwa nke obodo Tidore dina na Halmahera Island.

Hụkwa 

 Ago-Oba, ngalaba ntuli aka n'obodo Abeokuta, Ogun Steeti Naijiria
 Oba (mgbagwoju anya)