Classification
170 - Ethics
340 - Law
600 - Technology
620 - Engineering & allied operations
9
700 - The arts; fine & decorative arts
7
140 - Specific philosophical schools
6
300 - Social sciences
6
100 - Philosophy & psychology
5
320 - Political science
5
900 - History & geography
5
000 - Computer science, information & general works
3
333 - Economics of land & energy
3
361 - Social problems & social welfare in general
3
364 - Criminology
3
380 - Commerce, communications & transportation
3
576 - Genetics & evolution
3
580 - Plants (Botany)
3
610 - Medicine & health
3
200 - Religion
2
301 - Sociology & anthropology
2
304 - Factors affecting social behavior
2
330 - Economics
2
360 - Social problems & services; associations
2
363 - Other social problems & services
2
370 - Education
2
630 - Agriculture & related technologies
2
720 - Architecture
2
800 - Literature & rhetoric
2
120 - Epistemology, causation & humankind
1
346 - Private law
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
658 - General management
1