Established between 1895 and 1903, the Superintendent of Documents
classification system, called SuDoc for short, is based on the current
organization of the Federal Government. Classification is by government author,
or agency. For example, A=Agriculture Dept., HE=Health and Human Services Dept.
Because of changes in the organizational structure of the Federal Government,
call numbers are affected. Publications of a particular agency may be located
in several different places in the system.
If you have located a publication under its current number, the online
database will list any previous classification numbers, and the dates during
which those numbers were active.
LEVELS OF CLASSIFICATION:
C = Department of Commerce (government department or agency)
C 3. = Census Bureau (the agency or subordinate office)
C 3.2: = General Publications (series, serial title, or category of
Letters and numbers up to the colon = class stem
C 3.2:C 24/9 (letters and numbers after the colon = the individual
For further detail, consult:
MacGilvray, M. (Ed.). (1993). GPO classification: A practical guide to
the Superintendent of documents classification system. Revised January
1993. Washington, DC: U.S. Government Printing Office. [GP 3.29:P 88/993]
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Created by Statewide Information Services, Wyoming State Library, February
Last updated February 2003