Classification
170 - Ethics
600 - Technology
100 - Philosophy & psychology
33
140 - Specific philosophical schools
31
610 - Medicine & health
31
700 - The arts; fine & decorative arts
30
620 - Engineering & allied operations
24
000 - Computer science, information & general works
23
320 - Political science
22
330 - Economics
22
900 - History & geography
21
333 - Economics of land & energy
19
300 - Social sciences
16
370 - Education
14
340 - Law
12
363 - Other social problems & services
12
380 - Commerce, communications & transportation
7
576 - Genetics & evolution
7
580 - Plants (Botany)
7
630 - Agriculture & related technologies
6
200 - Religion
5
361 - Social problems & social welfare in general
5
500 - Natural sciences & mathematics
5
720 - Architecture
5
301 - Sociology & anthropology
4
530 - Physics
4
551 - Geology, hydrology & meteorology
4
581 - Specific topics in natural history
3
800 - Literature & rhetoric
3
120 - Epistemology, causation & humankind
2
304 - Factors affecting social behavior
2
350 - Public administration & military science
2
001 - Knowledge
1
174 - Occupational ethics
1
346 - Private law
1
360 - Social problems & services; associations
1
364 - Criminology
1
400 - Language
1
590 - Animals (Zoology)
1
612 - Human physiology
1
657 - Accounting
1
658 - General management
1
660 - Chemical engineering
1