Classification
140 - Specific philosophical schools
300 - Social sciences
576 - Genetics & evolution
600 - Technology
620 - Engineering & allied operations
4
900 - History & geography
4
170 - Ethics
3
340 - Law
3
630 - Agriculture & related technologies
3
100 - Philosophy & psychology
2
301 - Sociology & anthropology
2
333 - Economics of land & energy
2
363 - Other social problems & services
2
370 - Education
2
380 - Commerce, communications & transportation
2
580 - Plants (Botany)
2
610 - Medicine & health
2
700 - The arts; fine & decorative arts
2
720 - Architecture
2
800 - Literature & rhetoric
2
320 - Political science
1
330 - Economics
1
400 - Language
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
780 - Music
1