Each book is assigned a unique call number. The call number tells you the location of a book in the Library the same way a street address tells you how to find a specific house. You will find the call number on the spine of the book.
When you look up a book in the library catalog, you will see the call number for that book. Every call number begins with a letter, such as PS. 245.C23.
To find a book, look at the library directory below or by the elevators. Use the first letter of the book's call number to determine on which floor you will find the book.
We use Library of Congress Classification System (not Dewey Decimal system)
Most Geman film books start with the letters PN--5th floor of the AU Library.