Hesburgh Library Maps. The ND Library uses the Library of Congress call number system, which is an alphabetical arrangement of books by the initial letter.
Books are further sub-arranged by the next set of letters and numbers.
This number are proceeded by a decimal. In the library's computer catalog, the call numbers are written out in one line. Test Yourself Arrange the following call numbers in the correct order as if they were books on the shelf. Other development guides you might find useful. Matt T. Rosenberg at UC Davis is working on a hypertext version of the Library of Congress Classification System.