Dalhousie University Libraries uses the Library of Congress classification system.
For the most part, material for the study of classical antiquity is located in the LC classes PA (Classical Philology and Literature), and DE, DF and DG (for general Mediterranean, Greek and Roman history respectively).
Editions of classical works in the original languages are classified under call numbers beginning with PA, with some exceptions. Translations of classical literary works (poetry and drama) are classified under PA and G; however, translations into English of nonliterary works (e.g., history, philosophy and geography) are usually classified according to their subject matter—translations of Plato and Aristotle will be in the Bs. Classifications of commentaries and secondary literature on such works is a bit less consistent.