Classification
170 - Ethics
630 - Agriculture & related technologies
620 - Engineering & allied operations
11
600 - Technology
9
700 - The arts; fine & decorative arts
8
100 - Philosophy & psychology
7
140 - Specific philosophical schools
7
320 - Political science
7
300 - Social sciences
6
363 - Other social problems & services
6
610 - Medicine & health
5
333 - Economics of land & energy
4
340 - Law
4
000 - Computer science, information & general works
3
330 - Economics
3
380 - Commerce, communications & transportation
3
800 - Literature & rhetoric
3
576 - Genetics & evolution
2
580 - Plants (Botany)
2
720 - Architecture
2
900 - History & geography
2
200 - Religion
1
581 - Specific topics in natural history
1