Superintendent of Documents classification (SuDocs) numbers are assigned by the U.S. Government Printing Office to all official government publications. This system arranges materials by issuing agency, not by subject.
Below is a brief outline of the SuDocs system. Click here for a detailed explanation.
A Agriculture
AE National Archives
C Commerce
C 3 Census Bureau
CR Civil Rights Commission
CS Civil Service Commission
D Defense
E Energy
ED Education
EP Environmental Protection
FR Federal Reserve
FT Federal Trade Comm.
FTZ Federal Trade Zone Board
GA Government Accountability
Office
GP Government Printing Office
GS General Services
HE Health and Human Services
HH Housing and Urban
Development
I Interior
I 19 U.S. Geological Survey
IC Interstate Commerce Comm.
J Justice
Ju Judiciary
L Labor
LC Library of Congress
LR National Labor Relations Bd.
NA National Academy of
Sciences
NAS National Aeronautics &
Space Adm.
NS National Science Foundation
P United States Postal Service
PE Peace Corps
Pr President of United States
PrEx Executive Office of the
President
S State Department
SBA Small Business
Administration
SE Securities and Exchange
Commission
SI Smithsonian Institution
T Treasury Department
T 22 Internal Revenue Service
TD Transportation Department
VA Veterans Administration
X & Y Congress
X Congressional Record
House & Senate Journals
Y 1 Congressional Reports and
Documents
Y 4 Congressional Hearings
FDLP Basic Collection Research Guide: Core U.S. Government Resources - Core U.S. Government resources made available at all Federal depository libraries.
Government BookTalk - Welcome to the U.S. Government Publishing Office’s (GPO) Government Book Talk! Our goal is to raise the profile of some of the best publications from the Federal Government, past and present.
Many government agencies provide useful online calculator tools that cover a wide array of topics. To find tools and calculators, go to USA.gov or your favorite agency website. Type in your topic and the word 'calculator'. A few examples are listed below.