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.

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

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