NBC University Theater (also known as NBC University Theater of the Air, NBC Theater of the Air or NBC Theater) was a brand the National Broadcasting Co. applied to a category of radio programming. Although not actually a university, some colleges and universities collaborated in some of the programming, either contributing to its content or including the programming in their curriculum. NBC University Theater's most well-known radio series was The World's Great Novels. NBC used the name "University Theater" or similar from about 1923–1947.