Y Literature
Y11 Literature in General
YC Correspondence, Letters
YD Drama, Dialogues, Monologues
YF Fiction
YH Fables
YL Legends, Prose Sagas, Folk Literature (but not Folk Lore) Fairy Tales
YJ Juvenile
YP Poetry
YS Speeches, Oratory
YW Wit, Humour, Parodies
YZ Dialects
IN59 | X,Y,Z | Insular Languages (English, Celtic, Anglo-Romance)
P566 | X,Y,Z | Philology, Language, Linguistics