Definition of "OAS"

Initialism of oral allergy syndrome.  examples

Initialism of original antigenic sin.  examples

Initialism of Organization of American States.  examples

(Canada) Initialism of Old Age Security.  examples

(computing) Initialism of OpenAPI Specification. (a specification for machine-readable interface files for describing, producing, consuming, and visualizing RESTful Web services)  examples

Initialism of Organisation de l’Armée Secrète, a French organization.  quotations  examples