A monograph is generally a work on one (usually scholarly) subject, or one aspect of a subject, often created by a single author or artist. Traditionally it is in written form and published as a book, but it may be an artwork, audiovisual work, or an exhibition made up of visual artworks. In library cataloguing, the word has a specific and broader meaning; while in the United States, the Food and Drug Administration uses the term to mean a set of published standards.