Pardon Our Shelves

The Ross Pendergraft Library is making major changes to the arrangement of our collections.  Beginning the summer, the Library has begun a project to reorganize and relabel the collection from the Dewey Decimal Call Number System to the Library of Congress Call Number System.

The vast majority of books, housed at the Ross Pendergraft Library are classified in the Dewey Decimal call numbers system (DDC). While popular in public libraries and school libraries, most university and research libraries have moved away from the Dewey Decimal system and adopted the Library of Congress Classification System.

As of this summer, the Ross Pendergraft Library is joining this movement to organize our collections in a more modern way that helps researchers browse books on a similar topic next to each other on the shelves.

What Does A Library Of Congress Number Look Like?

Each book will have a label to help you identify where it is located on the shelf.  In the online database of library materials, Find It, searching for a book may result in an entry like this:

A screenshot showing a call number in Library of Congress classification: PS3604.I49 O64 2026.  This image links to the catalog entry for the item pictured, a book called Operation Bounce House by Matt Diniman.

Think of it like the residential address of a book:

This table compares elements to a Library of Congress Call number, in this case, PS3604 .I49 O64  to that of a residential address for the book
PS - City, State - Find it alphabetically (P, PN, PR PS…) - Identifies the main topic of the book.  In this case, American Literature

3604 - Street Name - Find it in numerical order (360, 3000, 3603, 3604). - Identifies a narrower subtopic, like individual authors publishing after 2001 and whose last name begins with D.

.I49 - House Number - Find it alphabetically first, then by decimal number (.I4435 comes before .I49)	Often associated with the author of the work. This alpha-numeric combination refers to the specific author, Matt Dinniman.

O64 - Apartment Number - Same as above, first alphabetically then by decimal number.	Sometimes used to denote the title of the work.  This combination refers to the title, Operation Bounce House.

On the shelf, the items will feature labels like this:

Image of books on the shelf showing four different spine labels containing call numbers in Library of Congress Classification in order.
The first number is PS3604.E349 K55 2025
The second number is PS3604.I467 M66 2023
The third book is PS3604.I49 O64 2026
The fourth book is PS3605.R59 P67 2025

Where Do I Find My Book Now?

Some of the library’s smaller collections have been converted to this system already.  These include the New Books collection, the Popular Reading Collection, the Graphic Collection, and the Reference Collection.  These are located on the first floor.

Some collections are partially being converted a little bit at a time.  For example, the Book Collection on the 2nd floor has been divided into two sections:

  1. The North Section includes all of the book collection still in Dewey Decimal Call number order. This is the majority of the collection at this time.
  2. The South Section includes any new or returning books to the book collection that have been newly converted to Library of Congress Collection.

The range of shelves containing the new Library of Congress numbers will feature green labels on the ends, and a flyer with a map of the two distinct sections.

An endcap, or the end of a range of shelves, containing green labels denoting the sections Q and PN-PR.  It also includes a flyer indicating the changes.

How Long Will This Project Take?

Because each book must be reclassified in our system and relabeled, the project will likely take more than a year to convert most of our book collections to the new system.  Some collections like our children’s book collection in the Curriculum Materials Center will remain in Dewey Decimal call number order to preserve the style of most school libraries for the students in our K-12 Education focused disciplines.

If you find yourself confused or daunted by the new system, you can always request a book via our Hold System.  When looking up a book in Find It, click on the title. In the Access Options window at the top, you’ll see a button to PLACE HOLD.  After filling out the required information, a staff member will retrieve the item and place it at our Research Help Desk.  You’ll then receive an email (usually within one business day) that your item is ready for pick-up.

A screenshot of a button for an item offering to Place Hold.  Clicking on this image will go to a blog post about how to place hold requests.

Thanks for continuing to support the library as we modernize and transform our collections to help making locating research materials easier within our shelves.  If you have questions, need help finding a book, or would like to know more about why the Library of Congress Classification System is far superior to the Dewey Decimal System, just ask us!

Gif of Conan the Library threatening a patron and asking, "DON'T YOU KNOW THE DEWEY DECIMAL SYSTEM???"  Clicking on the GIF will take you to the full clip of this skit from the 1989 film UHF, starring Weird Al Yankovich.