Classification
330 - Economics
23
630 - Agriculture & related technologies
16
610 - Medicine & health
11
363 - Other social problems & services
7
620 - Engineering & allied operations
6
636 - Animal husbandry
6
333 - Economics of land & energy
5
361 - Social problems & social welfare in general
4
600 - Technology
4
140 - Specific philosophical schools
3
580 - Plants (Botany)
3
000 - Computer science, information & general works
2
170 - Ethics
2
300 - Social sciences
2
380 - Commerce, communications & transportation
2
581 - Specific topics in natural history
2
900 - History & geography
2
100 - Philosophy & psychology
1
340 - Law
1
576 - Genetics & evolution
1
590 - Animals (Zoology)
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1
664 - Food technology
1
700 - The arts; fine & decorative arts
1
800 - Literature & rhetoric
1