Classification
300 - Social sciences
60
900 - History & geography
31
700 - The arts; fine & decorative arts
28
100 - Philosophy & psychology
26
320 - Political science
25
800 - Literature & rhetoric
25
306 - Culture & institutions
20
301 - Sociology & anthropology
19
302 - Social interaction
13
809 - History, description & criticism
12
380 - Commerce, communications & transportation
11
140 - Specific philosophical schools
10
600 - Technology
10
801 - Philosophy & theory
10
370 - Education
9
791 - Public performances
8
330 - Economics
7
150 - Psychology
5
200 - Religion
5
304 - Factors affecting social behavior
5
333 - Economics of land & energy
5
400 - Language
5
363 - Other social problems & services
4
410 - Linguistics
3
500 - Natural sciences & mathematics
3
576 - Genetics & evolution
3
581 - Specific topics in natural history
3
616 - Diseases
3
620 - Engineering & allied operations
3
658 - General management
3
720 - Architecture
3
780 - Music
3
000 - Computer science, information & general works
2
170 - Ethics
2
307 - Communities
2
340 - Law
2
610 - Medicine & health
2
003 - Systems
1
120 - Epistemology, causation & humankind
1
128 - Humankind
1
158 - Applied psychology
1
338 - Production
1
339 - Macroeconomics & related topics
1
350 - Public administration & military science
1
398 - Folklore
1
418 - Standard usage & applied linguistics
1
520 - Astronomy & allied sciences
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
745 - Decorative arts
1
more ...