Items in the catalog are assigned Subject Headings in the catalog. Subject Headings are meant to capture the most essential themes and content of the material (books, recordings, eResources, etc.). When you search by subjects, you are able to find a smaller collection of items that share the same essential subject matter. In catalog records, subjects are hyperlinked so that you can click on related subjects to browse related groups of items.
Subject headings can often be combined into a single subject with different facets. For example, if you search not just Clothing and dress but Clothing and dress--Great Britain you get results that limit to clothing from a particular geographic region (Great Britain), or you can get even more specific with Clothing and dress--Great Britain--History, or even Clothing and dress--Great Britain--History--17th century which will limit you to resources about the history of 17th century costumes in Great Britain. Once you have the pattern in mind, you can add and subtract facets as needed.
Here are some examples of subject headings and ways you can combine them:
Beauty culture -- United States -- History
Clothing and dress -- History -- To 500
Clothing and dress -- History -- Medieval, 500-1500
Clothing and dress -- Byzantine Empire -- History
Clothing and dress -- Egypt -- History
Clothing and dress -- Greece -- History
Clothing and dress -- Rome -- History
Costume designers -- New York (State) -- New York -- Biography --Dictionaries
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