1. National Library Joint Catalogue: The National Library Joint Catalogue is a book catalogue compiled under the auspices of the National Library or relevant institutions. It includes the catalogues of major libraries in China, and readers can learn about the collections of libraries in China by consulting this catalogue.
2. Subject joint catalogue: Subject joint catalogue is a book catalogue compiled under the auspices of academic institutions or professional libraries. According to the classification of subject fields, the book resources of related disciplines are sorted and catalogued.
3. International Library Joint Catalogue: The International Library Joint Catalogue is a book catalogue compiled under the auspices of the International Library Association or related institutions. It contains the book catalogues of major libraries in the world, and readers can obtain the information of book resources around the world by querying this catalogue.