It was one Kingdom stretching from Rafaï, Zemio and Obo in what is now the Central African Republic, to the regions of the Democratic Republic of Congo along the Uele River, and the Western Equatoria State in South Sudan.
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The Congolese Azande live in Orientale Province, specifically along the Uele River; and the Central African Azande live in the districts of Rafaï, Zémio, and Obo.
Another example is the bicyclic OBO protecting group (4-methyl-2,6,7-trioxa-bicyclo2.2.2octan-1-yl) which is formed by the action of (3-methyloxetan-3-yl)methanol on activated carboxylic acids in the presence of Lewis acids and was developed by Elias James Corey.
Tabun-Khara-Obo is an impact crater in the Dornogovi Aimag (province) the south-east of Mongolia.