At the Adelphi University Libraries, materials are assigned Library of Congress Subject Headings based on their content. When you view a OneSearch record, these subject headings will display as active links pointing to other materials with the same subject headings.
Here is a list of sample subject headings, although in no way exhaustive, used in finding materials about Theatre. Clicking on these links will take you to a OneSearch query according to that particular subject heading.
Materials at the Adelphi University Libraries (except for electronic resources) are given Call Numbers, based on the Library of Congress Classification System. Library of Congress Classification Systems organizes materials by Subject. The below list is shows how Theatre materials are organized. This is useful in browsing, whether by looking at the physical stacks themselves, or bibliographic records in OneSearch.
Theatrical Costumes GT1740-1747
Theatrical Dancing GV1781-1786.31
Theaters NA6820-6845
Monologue/Dialogue PN1530-1599
The Performing Arts PN1560-1590
Drama PN1600-3310
Dramatic Representation - Theater PN2000-3307
Collections of General Literature - Drama PN6110.5-6120
Costume, Clothing and Dress TT-TX340