Classification
140 - Specific philosophical schools
363 - Other social problems & services
380 - Commerce, communications & transportation
610 - Medicine & health
333 - Economics of land & energy
7
330 - Economics
4
600 - Technology
4
700 - The arts; fine & decorative arts
4
000 - Computer science, information & general works
3
304 - Factors affecting social behavior
3
580 - Plants (Botany)
3
320 - Political science
2
551 - Geology, hydrology & meteorology
2
620 - Engineering & allied operations
2
630 - Agriculture & related technologies
2
658 - General management
2
340 - Law
1
370 - Education
1
550 - Earth sciences
1
576 - Genetics & evolution
1
720 - Architecture
1
800 - Literature & rhetoric
1
900 - History & geography
1