The libraries use the Library of Congress Classification System to arrange the books on the shelves. The call number for a book will begin with a letter or letters representing one of the following broad subject areas:
A--General works (e.g. encyclopedias)
B--Philosophy, Psychology, and Religion
C--Auxiliary sciences (e.g. biography, genealogy)
D--History (except America)
E - F--History of the Americas (Missouri history: F 461-475)