Classification
363 - Other social problems & services
600 - Technology
700 - The arts; fine & decorative arts
5
620 - Engineering & allied operations
4
170 - Ethics
3
333 - Economics of land & energy
3
610 - Medicine & health
3
900 - History & geography
3
140 - Specific philosophical schools
2
300 - Social sciences
2
340 - Law
2
380 - Commerce, communications & transportation
2
576 - Genetics & evolution
2
580 - Plants (Botany)
2
630 - Agriculture & related technologies
2
720 - Architecture
2
800 - Literature & rhetoric
2
100 - Philosophy & psychology
1
320 - Political science
1
330 - Economics
1
370 - Education
1
551 - Geology, hydrology & meteorology
1