are responsible for assigning subject heading to the book, for deriving its class mark for placement of the books in the appropriate position on the shelves.

### Why this is right Cataloguers create the catalogue records that help people find and identify books. As part of this work, they assign subject headings to show what a book is about and a class mark to determine where it belongs in the library’s shelving system. ### The concept A **subject heading** is a standard topic label in a catalogue, so books about the same subject can be found together in a search. A **class mark** is a code based on the library’s classification system; it groups a book with related subjects and helps indicate its shelf position. Cataloguing therefore supports both finding books by topic and locating them physically. The other job titles are broader or refer to different work. | Role or term | Main function | |---|---| | Cataloguer | Describes and classifies library materials, including assigning subject headings and class marks | | Librarian | A broad professional role that may include managing collections, helping readers and overseeing library services | | Library officer | A general library staff role whose duties vary by library | | Bookkeeper | Records financial transactions, not the subjects or shelf locations of books | ### The other options - **A. Librarian**: A librarian may oversee cataloguing, but the specific tasks named here are cataloguing duties. This option is tempting because librarians work with books and library collections. - **B. Library officers**: This is a broad staff title, not the specific role defined by assigning subject headings and class marks. Library officers may perform varied operational duties. - **D. Bookkeepers**: Bookkeepers record financial transactions. The title is tempting because it involves keeping records, but these are financial records rather than library catalogue records. ### Terms - **Cataloguer**: A library worker who creates records describing materials and helps classify them for discovery and arrangement. - **Subject heading**: A standard topic label used in a catalogue to group materials about the same subject. - **Class mark**: A code assigned under a classification system to group a book by subject and guide its shelf placement. - **Classification system**: A method for arranging library materials into subject groups. ### Remember When a question links subject headings and class marks to organising books for discovery and shelving, think of cataloguing.