Listed below are the letters and titles of the main classes of the Library of Congress Classification. Click on any class to view an outline of its subclasses in an interactive PDF format. This list is based on the Library of Congress Classification Outline.
B -- Philosophy, Psychology, Religion
C -- Auxiliary Sciences of History
Primary Sources are original materials from the time period involved. They typically have not been filtered, influenced or analyzed through interpretation. They bring us as close to the original event or thought as possible.