PN - General Literature 12,280
P - Philology and Linguistics 10,523
PS - American Literature 8,914
PR - English Literature 8,692
PE - English Languages 3,360
PQ - French, Italian, Spanish, Portuguese Literature 2,482
PA - Latin and Greek 2,061
PL - Eastern Asia, Africa, Oceania 1,904
PJ - Oriental 1,049
PT - European, Asian and African Literature 873
PZ - Fiction 856
PG - Slavic, Baltic, Abanian Languages 784
PC - Romanic Languages 778
PM - Hyperborean, Indian, and Artificial Languages 390
PK - Indo-Iranian 315
PF - West Germanic Languages 258
PD - Germanic Languages 198
PB - Modern and Celtic Languages 122
PH - Uralic, Basque Languages 61