The indexes of the Library of Congress Classification (LCC) system are lists of terms and subjects that are used to organize and classify library materials according to the LCC system. The indexes are used to assign call numbers to the materials in a library’s collection, which are then used to physically arrange the materials on the library shelves. The LCC indexes include terms and subjects from a wide range of disciplines, including the arts, humanities, sciences, and social sciences. The indexes are revised and updated periodically to keep up with changes in knowledge and technology. In addition to the main LCC indexes, there are also specialized indexes for certain subjects or languages, such as law or music. The LCC indexes are an important tool for libraries that use the LCC system, as they help to ensure that materials are organized and classified in a consistent and logical way.