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LC Subject Headings
Library of Congress Subject Headings (LCSH) are topical descriptions of the information contained in the item (books, articles, media). There are more than 300,000 in 6 large red volumes at the Reference Desk and found in the online catalog. They are widely used and accepted in North America and around the world.
Any book or other item may have one or more subject headings assigned to it by trained professionals at the Library of Congress (LC). Some examples of LCSH are:
- Photography of Cats
- Cerebral Dominance
- Theatre Organ Music
- United States -- History -- Civil War, 1861-1865
- Church and State -- Soviet Union
Subject Searching in LSU's Online Catalog
You'd think you could enter any topic as a Subject search in the online catalog. However, the Subject search uses LCSH terms to organize books by subject. If you enter your keywords as a Subject search, you may not get much back.
If you entered a Subject Heading search for: acquired immune deficiency syndrome you would get NO books. The catalog would direct you to the official LCSH heading... AIDS (Disease).
If you entered a Subject Heading search using Library of Congress Subject Heading (LCSH) term, AIDS (Disease) you would see the LSU Library has around 27 books, plus many more with subheadings attached.