Classification
600 - Technology
630 - Agriculture & related technologies
620 - Engineering & allied operations
37
300 - Social sciences
10
900 - History & geography
10
320 - Political science
8
363 - Other social problems & services
8
330 - Economics
7
100 - Philosophy & psychology
3
333 - Economics of land & energy
3
580 - Plants (Botany)
3
581 - Specific topics in natural history
3
610 - Medicine & health
3
700 - The arts; fine & decorative arts
3
140 - Specific philosophical schools
2
200 - Religion
2
551 - Geology, hydrology & meteorology
2
800 - Literature & rhetoric
2
000 - Computer science, information & general works
1
170 - Ethics
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
340 - Law
1
364 - Criminology
1
380 - Commerce, communications & transportation
1
540 - Chemistry & allied sciences
1
550 - Earth sciences
1
576 - Genetics & evolution
1
590 - Animals (Zoology)
1