The Dewey Decimal and Library of Congress classification systems organize books by their subject. The Superintendent of Documents (SuDoc) classification system organizes United States documents by the issuing agency. Texas, as well as many other states, use similar classification systems. This means that all publications of the State Department are in one place; however it also means that not all government documents on a particular subject are in one place.
The three main rules for determining SuDoc order are:
- Punctuation acts as a divider, not as a decimal point
- HE 3.25/4:998 (3 comes before 20)
- HE 20.109:96/2 (109 comes before 1002)
- HE 20.1002:970
- Letters before numbers
- HE 20.24:D 43
- HE 20.24:997/2
- Nothing before something
- C 1.1:998
- CC 1.1:996
Remember that SuDoc numbers can be long and complicated -- be sure to write down the complete call number for your material when using the indexes.
Ask for help at the Documents Desk.