Listed below are the letters and titles of the main classes of the Library of Congress Classification. Click on any class to view an outline of its subclasses.
E -- History of the Americas (United States)
F -- History of the Americas (US local history, North America, Latin America)
Penrose Library organizes books using Library of Congress call numbers. Similar to the Dewey Decimal classification, Library of Congress call numbers act as a book's address on the shelf. Call numbers are made up of a combination of letters and numbers that represent specific subjects. Library of Congress uses the letters of the alphabet to represent broad subject categories and subdivisions. For example, J represents Political Science and R represents Medicine.
When you find a book you're interested in the catalog, you'll see a location and call number listed. Using Brother, I'm Dying by Edwidge Danticat as an example, the catalog lists the call number as PS3554.A5815 Z46 2007. Additionally it indicates the book is shelved on the 2nd Floor and is available for check out.
To understand the call number for this book, here's how to break it down:
P represents the broad subject of Language & Literatures. Books are shelved first by this section of the call number, in alphabetical order.
PS gathers books representing American Literature.
3554 represents a further refinement of the subject. In this case it stands for books published between 1961 and 2000 and is treated as a whole number.
.A5815 represents the author's name. Because there are so many American authors, this number may get quite complex.
Z46, the final element, represents the title of the book. This section should be read alphabetically, then as a decimal number (not a whole number.) For example, .Z744 will come after .Z4 and before .Z946.
1995 is the year the book was published. Dates do not always appear as part of a call number.
On the Penrose Library shelves, Brother, I'm Dying is surrounded by books with these call numbers, all of which were written by Danticat:
PS3554.A5815 B54 1994
PS3554.A5815 O96 2004
PS3554.A5815 Z46 2007
PS3554.A5815 Z463 2010
To help you find where a book is located, call number ranges appear on the end panel of each row of shelves. PS3554.A5815 Z46 2007 will be in the range of shelving that is labeled PS3544.H43 - PS3554.U49.
The catalog provides the ability to text message the call number to a personal cell phone. Standard text-messaging fees may apply.
Allen Room - 2nd Floor
Archives/Special Collections - 1st Floor
Atlases - 1st and 2nd Floor
Audio books - (accessible online)
Documents - 1st and 2nd Floor
eBooks - (accessible online)
General Collection - 1st, 2nd, 3rd, and 4th Floor
Juvenile - 1st Floor
Microforms - in Archives/Special Collections - 1st floor
Northwest Collection - 1st Floor
Oversize/Folio - 1st Floor
Popular Literature - 2nd Floor
Reference - 2nd Floor
Reserves - Circulation desk
Serials - 1st Floor (some accessible online)
Video - 2nd and 3rd Floor
Don't hesitate to ask for help if you find Library of Congress call numbers confusing. Any member of the library staff or a librarian would be glad to assist you.
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