Tarleton Libraries utilizes the Library of Congress Classification System to organize materials in the collection. Useful call number ranges include:
- PC - Romance Languages
- PC2001-3761 - French
- PC4001-4977 - Spanish
- PD - Germanic languages. Scandinavian languages
- PF - West Germanic languages
- PQ - French literature, Italian literature, Spanish literature, Portuguese literature
- PQ1-3999 - French literature
- PQ6001-8929 - Spanish literature
- PT - German literature, Dutch literature, Scandinavian literature, and more
- PT1-4897 - German literature