It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
The library uses the Library of Congress classification system to organize our collections.
Each book receives a "call number" that works like an address--you can use the call number to find the exact location of a book on the shelves. Every book has a unique number, and different numbers are organized by their topics.