Classification
000 - Computer science, information & general works
363 - Other social problems & services
610 - Medicine & health
700 - The arts; fine & decorative arts
5
333 - Economics of land & energy
4
320 - Political science
3
330 - Economics
3
551 - Geology, hydrology & meteorology
3
576 - Genetics & evolution
3
600 - Technology
3
658 - General management
3
140 - Specific philosophical schools
2
304 - Factors affecting social behavior
2
370 - Education
2
380 - Commerce, communications & transportation
2
581 - Specific topics in natural history
2
620 - Engineering & allied operations
2
100 - Philosophy & psychology
1
340 - Law
1
550 - Earth sciences
1
580 - Plants (Botany)
1
630 - Agriculture & related technologies
1