So, you walk into the library, ready to find that perfect book for your research paper—and BAM. You see a call number like this: HQ1236 .S94 2021.
What does it mean? Is it a secret code? A math problem? Nope—it's the Library of Congress Classification System, and once you know the basics, it's actually pretty helpful.

What Is the LoC System?

Think of it like a super-organized GPS for books. Instead of organizing books by numbers like the Dewey Decimal System (remember that from school?), the LoC uses letters + numbers to group books by subject.

The Basics:

Each book gets a call number that works like an address on the shelf. Let's break one down:

HQ1236 .S94 2021

• HQ = the subject (in this case, Women – Social and political status)
• 1236 = a more specific topic within that subject
• .S94 = the author’s last name, kind of like alphabetical order
• 2021 = the year it was published

How to Find a Book Using LoC:

1. Search the Library Catalog. Use keywords, titles, or author names. Once you find your book, write down (or screenshot) the call number.
2. Know the General Sections:
   • A–Z = Main subject areas (e.g., B = Philosophy, E–F = American History, P = Literature)
3. Follow the Signs in the Library. The shelves (also known as stacks) are labeled by call number ranges.
4. Read the Call Number in Order:
   • Start with the letters → then the whole number (e.g., 1236) → then the decimal (.S94) → then the year.
5. Celebrate! You’ve just located a book like a LoC pro.

Bonus Tip:

Don’t want to wander the stacks? Ask a librarian—they're LoC experts and happy to help.

Need help finding something? Just head to the library’s homepage and start a chat with us — we’re here to help!