A. GENERAL WORKS
AC Collections, Series, Collected
works
AE Encyclopedias (General)
AG Dictionaries & other general
reference works
AI Indexes
AS Academies & learned societies
AY Yearbooks, Almanacs, Directories
AZ History of scholarship &
learning
B. PHILOSOPHY, PSYCHOLOGY, RELIGION
B Philosophy
BC Logic
BD Speculative philosophy
BF Psychology
BH Aesthetics
BJ Ethics
BL Religions, Mythology, Rationalism
BM Judaism
BP Islam, Bahaism, Theosophy, etc.
BQ Buddhism
BR-BX Christianity
C. AUXILIARY SCIENCES OF HISTORY
C Auxiliary sciences of history
(General)
CB History of civilization (General)
CC Archaeology
CD Diplomatics, Archives
CE Technical Chronology, Calendars
CJ Numismatics
CS Genealogy
CT Biography
D. HISTORY: GENERAL & OLD WORLD
D History (General)
DA Great Britain
DB Austria, Hungary
DC France
DD Germany
DE Mediterranean region
DF Greece
DG Italy
DH-DJ Netherlands, Belgium, Luxembourg
DK Russia, Poland
DL Scandinavia
DP Spain & Portugal
DQ Switzerland
DR Balkan peninsula, Turkey
DS Asia
DT Africa
DU Oceania (South Seas)
E. HISTORY: AMERICAS (GENERAL)
E United States (General)
E 71+ Indians of North America
F. HISTORY: AMERICAS (LOCAL)
F 726+ Montana
G. GEOGRAPHY, ANTHROPOLOGY, RECREATION
G Geography
GA Mathematical geography, Cartography
GB Physical geography
GC Oceanography
GE Environmental sciences
GF Human ecology, Anthropogeography
GN Anthropology
GR Folklore
GV Recreation, Leisure
H. SOCIAL SCIENCES
H Social Sciences (General)
HA Statistics
HB-HD Economics, Industries, Labor
HE Transportation and communication
HF Commerce
HG-HJ Finance
HM-HX Sociology
J. POLITICAL SCIENCE
JA Political science (General)
JC Political theory
JF-JV Political institutions &
public administration
JZ International relations
K. LAW
K Law (General)
KE Canada
KF United States
KJ Europe
L. EDUCATION
L Education (General)
LA History of education
LB Theory & practice of education
LC Special aspects of education
LD-LJ Individual institutions, colleges,
universities, & schools
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M. MUSIC
M Music
ML Literature of music
MT Musical instruction & study
N. FINE ARTS
N Visual arts (General)
NA Architecture
NB Sculpture
NC Drawing, Design, Illustration
ND Painting
NE Print media
NK Decorative arts
P. LANGUAGE & LITERATURE
P Philology, Linguistics
PA Classical languages & literature
PB-PH Modern European languages
PJ-PL Oriental languages & literature
PM American Indian languages &
artificial languages
PN Literature (General), Literary history
PQ French, Italian, Spanish literatures
PR English literature
PS American literature
PT Germanic literatures
Q. SCIENCE
Q Science (General)
QA Mathematics and Computer science
QB Astronomy
QC Physics
QD Chemistry
QE Geology
QH Natural history, Biology (General)
QK Botany
QL Zoology
QM Human anatomy
QP Physiology
QR Microbiology
R. MEDICINE
R Medicine (General)
RA Public aspects of medicine
RB Pathology
RC Internal medicine
RD Surgery
RE Ophthalmology
RF Otorhinolaryngology
RG Gynecology & obstetrics
RJ Pediatrics
RK Dentistry
RL Dermatology
RM Therapeutics, Pharmacology
RS Pharmacy
RT Nursing
RV Botanic, Thomsonian, & eclectic
medicine
RX-RZ Homeopathy, Other systems of
medicine
S. AGRICULTURE
S Agriculture (General)
SB Plant culture (General)
SD Forestry
SF Animal culture
SH Aquaculture, Fisheries, Angling
SK Hunting sports
T. TECHNOLOGY
T Technology (General)
TA Engineering (General), Civil
engineering (General)
TD Environmental technology
TE Highway engineering
TH Building construction
TJ Mechanical engineering and
machinery
TK Electrical engineering,
Electronics
TL Motor vehicles, Aeronautics,
Astronautics
TP Chemical technology
TR Photography
TS Manufactures
TT Handicrafts, Arts & crafts
TX Home economics
U. MILITARY SCIENCE
V. NAVAL SCIENCE
Z. BIBLIOGRAPHY & LIBRARY SCIENCE
ZA Information Resources
(General)
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