• A subject heading is a word or phrase that is used to describe the subject content of a work.



• Library of Congress Subject Headings (LCSH) are books that provide lists of topics under which you can find materials in the library's catalog.



• LCSH provides other terms, called cross-references, which can also be used to describe the topic.



• LCSH is useful when attempting to narrow or broaden a topic. If you are finding too much, narrow your topic.  If you are finding too little, try a broader heading.



• The key to abbreviations is inside the front cover of each volume.

A sample entry from the Library of Congress Subject Headings, 23rd edition:

Symbols
UF   Used for (Use bold terms instead)
BT   Broader Term
RT   Related Term
SA   See also
NT   Narrower Term
(May Subd Geog): Place names may follow the heading