Library organization varies across cultures and types of libraries (academic and public libraries use different systems, for example). SCAD Libraries use the Library of Congress Call Number System. Every item in the library has a call number, usually printed on a sticker and adhered to the spine of the item. This unique combination of letters and numbers acts as the address for the item, but also contains important information about the item’s subject, author, and publication.

What are call numbers for?

Each book, DVD, and special collection item in the library is assigned a unique call number, which tells you where to find the book. You would first locate the call number by searching the catalog using title, keywords, or an author you're looking for. We're using the example to the right to search for the book "Visualizing Research" at SCAD Libraries:

In the catalog the call number reads: NK1170.G68 2004

On the spine of the book the call number reads:

NK
1170
.G68
2004

How do I read a call number?

What does the call number mean?

The Library of Congress classification system arranges materials by subject. The first sections of the call number represent the subject of the book. The letter and decimal section of the call number represent the author's last name. The last section is the year the book was published, but not all books will have this included in the call number.

How are items arranged using the call number system?

First, alphabetically (by subject), and then numerically. Use this guide to get a better understanding of the order and where you might find the book "Visualizing Research" in the library:

Content adapted from Shasta College Library.