A GENERAL WORKS
General encyclopedias, ref. works
B PHILOSOPHY, RELIGION, PSYCHOLOGY
B-BJ Philosophy
BF Psychology
BL-BX Religion
C AUXILIARY SCIENCE OF HISTORY
CB History of civilization (general)
CC Archaeology
CR Heraldry
CS Genealogy
CT Biography (general)
D HISTORY GENERAL AND WORLD
D World history including world wars
DA-DR Europe
DS Asia
DT Africa
DU Oceania
E-F HISTORY OF AMERICA
E 1-143 America (general)
E 151-857 United States (general)
UNITED STATES (STATES AND LOCAL)
G GEOLOGRAPHY, ANTHROPOLOGY, FOLKLORE, RECREATION
;G Geography (general)
GB Physical geography
GC Oceanography
GN Anthropology
GR Folklore
GV Recreation
H SOCIAL SCIENCE
HA Statistics
HD Agriculture and industry
HF Business
HG Finance (general)
HM-HX Sociology
HM General works, Theories
HQ Family, Marriage, women
HT Urban and rural sociology
HX Socialism, Communism
J POLITICAL SCIENCE
JA Political science (general)
JC Political theory
JF-JQ Constitutional history and public Administration
JS Local government
JX International law
K LAW
L EDUCATION
LA History of education
LB Theory and practice of teaching
LC Special aspects of education
LD-LG Individual institution (by country)
M MUSIC & BOOKS ON MUSIC
N FINE ARTS
NA Architecture
NB Sculpture
NC Graphic arts
ND Painting
P LANGUAGE, LITERATURE
PA Classical languages and literature
PE English language
PN General and comparative literature
PQ Romance literature
PR English literature
PS American literature
PT Germanic literatures
Q SCIENCE
QA Mathematics
QB Astronomy
QC Physics
QD Chemistry
QE Geology
QH Natural history
QH 301 -705 Biology
QK Botany
QL Zoology
QM Human anatomy
QP Physiology
QR Bacteriology
R MEDICINE
RA Public aspects of medicine: public health, mental hygiene, medical centers
RT Nurses and nursing
S AGRICULTURE
T TECHNOLOGY
TA General engineering
TC Hydraulic engineering
TD Sanitary/municipal engineering
TH Building construction
TJ Mechanical engineering
TK Electrical, nuclear engineering
TR Photography
TS Manufactures
TT Handicrafts, arts, and crafts
TX Home economics
U MILITARY SCIENCE
V NAVAL SCIENCE
Z BIBLIOGRAPHY, LIBRARY SCIENCE,
INFORMATION RESOURCES
