Library of Congress Classification Chart

A GENERAL WORKS   P LANGUAGE & LITERATURE
  AE Encyclopedias     P Linguistics
  AY Almanacs     PA Classical Languages
          PD-PF Germanic Languages
B PHILOSOPHY - RELIGION     PJ-PL Oriental Languages
  B-BJ Philosophy     PN General & Comparative Literature
  BL-BX Religion     PQ Romance Languages
          PR English Literature
C AUXILIARY SCIENCES OF HISTORY     PS American Literature
  CB History of Civilization     PT Germanic Literature
  CC Archaeology        
  CT Biography (general)   Q SCIENCE
          QA Mathematics
D GENERAL & OLD WORLD HISTORY     QA75 Computers
  D World History     QC Physics
  DA Great Britain     QD Chemistry
  DB-DX Other Countries     QH Natural History, Biology
          QK Botany
E-F HISTORY OF AMERICA     QL Zoology
  E 1-143 North America     QM Human Anatomy
  E151- United States        
  F1-975 U. S. Local History   R MEDICINE
  F1201- Other Countries     R General, Medical Records
          RC International Medicine, Diagnosis
G GEOGRAPHY, ANTHROPOLOGY, FOLKLORE     RG-RJ Gyn/Obs, Pediatrics
  G-GB Geography     RK Dentistry
  GR Folklore     RM-RS Pharmacology
  GV Sports, Recreation     RT Nursing
             
H SOCIAL SCIENCES   S AGRICULTURE
  HA Statistics     SD Forestry
  HB-HJ Economics     SH Fish Culture
  HM-HX Sociology        
        T TECHNOLOGY
J POLITICAL SCIENCE     TK Electrical Engineering, Electronics, Nuclear Engineering
          TR Photography
K LAW     TT Handicrafts
          TX Home Economics
L EDUCATION        
        U MILITARY SCIENCE
M MUSIC        
        V NAVAL SCIENCE
N FINE ARTS        
  NA Architecture   Z BIBLIOGRAPHY, LIBRARY SCIENCE
  NC Graphic Arts        
  ND Painting