What does OAS stand for in API specifications?

The term OAS stands for Open API Specification, which is a widely recognized standard used for defining and documenting RESTful APIs. This specification allows developers and organizations to create a clear and consistent description of their API, detailing its endpoints, operations, request/response formats, and other important aspects. The Open API Specification promotes better collaboration between teams by providing a standardized format for describing API behavior, which can be easily interpreted by both humans and machines. This comprehensive documentation enhances API discoverability and usability, and many tools and platforms are built around OAS to facilitate API design, development, and testing.

The other interpretations presented do not accurately reflect the established meaning within the context of API specifications, making Open API Specification the correct choice.