Classification systems group items by subjects or topics, e.g., astronomy or Texas law. Hence, books on astronomy would be shelved together in the library under the LC classification, QB, and books on Texas law would be shelved together under the LC classsification, KFT.

1. You won't see what is available at other campuses or checked out; and 
2. This guide is very general, so many items on a topic might shelved in other places. 

Library of Congress Classification System http://geography.miningco.com/llibrary/congress/bllc.htm

The data on this site was compiled from the LC Classification Outline, the in-depth outlines at the beginning of Library of Congress Classification Schedules, and by outlining schedules. The site was created by Matt Rosenberg - geography.guide@miningco.com 

For a tutorial on Understanding and Reading [sic] Call Numbers, you can go to this site.

This National Library of Medicine Fact Sheet explains and gives a general outline to the NLM Classification System.
 

Detailed information on the LC Classification System.  Restricted to ACC students and staff.