ABSTRACT
The task of subject cataloging includes two parts: assigning subject headings and assigning classification numbers. In supermarkets or in stores, a classification system arranges all the same and related merchandise together on the shelves so that it is easier for the customers to find what they want. In a library, this objective is even more important. A classification system provides a powerful tool to extract information not only from the library catalogs but from the global information network as well. Beginner library technicians should adhere to the following procedures in classifying materials. Pay special attention to the copious notes that are included in the schedules, giving explanations and directions on how to build the number, how to use the tables, and other important instructions. The combination of the classification number and the book number gives every item in the library a unique notation that places the item in a specific location.
