A                   GENERAL WORKS
	   AE          Encyclopedias

B                   PHILOSOPHY & RELIGION
	   B-BD,BH-BJ  Philosophy
	   BF          Psychology
	   BL-BX       Religion

C                   AUXILIARY SCIENCES OF HISTORY
	   CC          Archaeology

D                   HISTORY: General, Europe, Asia, Africa, Oceania
	   DA-DR       Europe
	   DS          Asia
	   DT          Africa
	   DU          Oceania

E-F                 HISTORY:  North, Central & South America

G                   GEOGRAPHY, MAPS, ANTHROPOLOGY, RECREATION
	   G-GB        Geography, Maps
	   GC          Oceanography
	   GF-GR       Anthropology
	   GV          Recreation

H                   SOCIAL SCIENCES
	   HA          Statistics
	   HB-HJ       Economics
	   HM-HX       Sociology

J                   POLITICAL SCIENCE

K                   LAW
	   KF          Law of the United States

L                   EDUCATION

M                   MUSIC

N                   FINE ARTS
	   NA          Architecture
	   NB          Sculpture
	   NC          Drawing
	   ND          Painting
	   NE          Print Media
	   NK          Decorative Arts

P                   LANGUAGE & LITERATURE
	   PB-PH       European Languages
	   PN          Literary History & Collections
	   PQ          French & Spanish Literature
	   PR          British Literature
	   PS          American Literature
	   PT          Germanic Literatures

Q                   SCIENCE & MATHEMATICS
	   QA          Mathematics, Computer Science
	   QB          Astronomy
	   QC          Physics
	   QD          Chemistry
	   QE          Geology
	   QH-QR       Biology

R                   MEDICINE

S                   AGRICULTURE
	   SB          Plant Culture
	   SD          Forestry
	   SF          Animal Culture

T                   TECHNOLOGY
	   T-TP,TS     Engineering, Construction
	   TR          Photography
	   TX          Nutrition, Cookery

U                   MILITARY SCIENCE

V                   NAVAL SCIENCE

Z                   BIBLIOGRAPHY & LIBRARY SCIENCE