Initialism of on or about.

Initialism of open access. / Initialism of organizing authority. / Initialism of office assistant.

(Philippines) Initialism of overacting.

(Scouting) Order of the Arrow

Initialism of oral allergy syndrome. / Initialism of original antigenic sin.

(American continent, organisations) Initialism of Organization of American States. / (Canada) Initialism of Old Age Security.

A municipality of Albay, Philippines.

A surname from Norwegian.

the second largest island in the Marquesas, final resting place of Gauguin and Brel, home of many tikis

a waterfall located in southern Africa on the Zambezi river, also known as Victoria Falls