Superintendent of Documents Classification System (SUDOC)

As a Federal Depository Library, Randall Library receives many publications issued by agencies of the U.S. Government. These publications, which may include books, maps, posters, pamphlets, and periodicals, contain information on a wide variety of subjects.  The resources in the collection are produced by the many agencies and departments of the U. S. Government.

Federal Government publications in this collection are arranged by the Superintendent of Documents classification number, (SuDoc). Publications are grouped together by issuing agency. To ensure that you find all of the materials available on a particular subject, be sure to check the indexes recommended by library staff. Most materials are distributed to Depository Libraries in online format and many resources are distributed in print format.

Each part of the SuDoc number defines the issuing agency, the subordinate agency and the type of material.  The example below shows how the Superintendent of Documents classification number C 61.34:987 is constructed for the publication entitled "U.S. Industrial Outlook:"

C: Commerce Department (issuing agency)

61:  International Trade Administration(subordinate bureau within the agency)

34: Number designating the title 

987: Year of Publication (1987)


Here are the prefixes from the Superintendent of Documents classification numbers for some other agencies that you may be interested in:

A - Agriculture Department
C 3 - Census Bureau (Commerce Department)
D - Defense Department
E - Energy Department
ED - Education Department

EPA-Environmental Protection Agency
GA - General Accounting Office
GS - General Services Administration
HE - Health and Human Services Department
I - Department of the InteriorI 19  -U.S. Geological Survey (Interior Department)

J - Justice Department
Ju - Judiciary
L - Labor Department
LC - Library of Congress
NAS - National Aeronautics and Space Administration

S - State Department
SI - Smithsonian Institution
T 22 - Internal Revenue Service (Treasury Department)
X and Y - Congress
Y 4. - Congressional Committees

Library staff will be happy to provide you with the prefixes for any Government agency and any other information that can help you find the materials you want. Most U.S. Government publications published since 1990 are searchable in the Randall Library Catalog.

Contact Librarian

Elisabeth Garner

Interim Government Resources Coordinator


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