The book collection continues from the 3rd floor with call numbers beginning with letters PT through Z. Books on literature, science, medicine, and technology may be found here. Books are arranged by subject, using a system called the Library of Congress classification scheme.
Access the 4th floor via the front stairs or the elevator. If you need assistance locating a book, please ask the Circulation Desk staff who will be happy to help.
There is wireless access on this floor.