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