Class Z: Bibliography. Library Science. Information resources is a classification used by the Library of Congress Classification system. This page outlines the sub-classes of Class Z.[1][2]
240-241.5...........Incunabula. Block books. Including broadsides, playing cards
242.9-264.5.........Practical printing. Including printing as a business, layout, paper and ink, machinery, type and type founding, electrotyping, desktop publishing, typesetting, presswork
265-265.5...........Representation or reproduction of books, documents, etc., by photography, microphotography, or other means
716.2-718.85........Libraries in relation to special topics. Including libraries and community, libraries and television, children's libraries, libraries and students