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Call Numbers & Classification Systems at Rod Library: Start Here

Rod Library uses Library of Congress, Superintendent of Documents, and Dewey Decimal System to classify books. Read about them here.

About this Guide

There are three classification systems in use at the Rod Library.  This guide includes explanations of these systems to help you better understand where the information you need will be located.

WHAT IS A CALL NUMBER?

A call number is a group of letters and numbers listed both on the book and in the library catalog (OneSearch!) indicating the location of the book or item in the library.  The call number is usually located on the spine of the book, but occasionally can be found on the front cover of the book.

 

Classification Systems Used in Rod Library

Interior of the Library of Congress

The majority of the materials at Rod Library are classified using the Library of Congress Classification System.  Library of Congress call numbers start with letters. The letters designate the subject area.  In the Rod Library, books with call numbers starting with A through K are on the third floor, and books with call numbers starting with L through Z are on the top (fourth floor).  Journals  in the Rod Library are also shelved by Library of Congress Classification numbers.  Search for a journal title in OneSearch! (the Library catalog) to find the call number for that journal.  These will be located on floor one in the library.

                                                                                              Interior of the Library of Congress

The Dewey Decimal System is used in the Youth Collection to more closely resemble a school library.  These call numbers start with numbers which designate the subject area. 

 

Melville Dewey

  

 

 Melville Dewey, librarian and inventor of the Dewey decimal System

 

                             

          

            

               

     

The third classification system used in Rod Library is the Superintendent of Documents Classification System.  The Rod Library is a partial depository for U.S. government documents and the Superintendent of Documents Classification System is used on those documents.  The call numbers for these start with letters also, but, unlike the Library of Congress, Superintendent of Documents call numbers have a colon (:) in them. 

Adelaid R. Hasse

In these call numbers, the beginning letter stands for the government department or agency producing the document.

      

    

Adalaid R. Hasse, first Superintendent of Documents librarian and inventor of the Superintendent of Documents Classification System.

Subject Guide