Answered By: Denise Brush
Last Updated: Oct 06, 2016     Views: 14

Library of Congress Classification divides all materials into main letter-based classes from A-Z and then subdivides them into more specific categories. For example:

Q = Science 
QR = Microbiology
QR 180 through QR 189.5 = Immunology 

At Campbell Library, materials in LC classes A through K are located on the third floor and L through Z are on the fourth floor. 

You can use the library catalog to find the call numbers for specific books, or the librarian at the reference desk can assist you.