PN - General Literature 52,423
PS - American Literature 26,270
PR - English Literature 17,139
P - Philology and Linguistics 11,514
PQ - French, Italian, Spanish, Portuguese Literature 6,009
PZ - Fiction 3,318
PE - English Languages 2,674
PA - Latin and Greek 2,357
PT - European, Asian and African Literature 1,906
PL - Eastern Asia, Africa, Oceania 1,895
PG - Slavic, Baltic, Abanian Languages 1,435
PJ - Oriental 990
PC - Romanic Languages 753
PK - Indo-Iranian 355
PM - Hyperborean, Indian, and Artificial Languages 348
PF - West Germanic Languages 269
PB - Modern and Celtic Languages 180
PD - Germanic Languages 143
PH - Uralic, Basque Languages 85