PS - American Literature 18,066
PR - English Literature 15,583
PN - General Literature 10,866
PQ - French, Italian, Spanish, Portuguese Literature 6,189
PT - European, Asian and African Literature 3,207
PA - Latin and Greek 3,032
PG - Slavic, Baltic, Abanian Languages 2,326
PL - Eastern Asia, Africa, Oceania 1,171
P - Philology and Linguistics 1,113
PZ - Fiction 757
PE - English Languages 681
PJ - Oriental 595
PC - Romanic Languages 328
PK - Indo-Iranian 246
PH - Uralic, Basque Languages 83
PF - West Germanic Languages 74
PM - Hyperborean, Indian, and Artificial Languages 59
PB - Modern and Celtic Languages 47
PD - Germanic Languages 14