Classification
380 - Commerce, communications & transportation
610 - Medicine & health
18
000 - Computer science, information & general works
10
333 - Economics of land & energy
10
370 - Education
10
700 - The arts; fine & decorative arts
10
140 - Specific philosophical schools
7
363 - Other social problems & services
7
580 - Plants (Botany)
6
330 - Economics
5
600 - Technology
4
340 - Law
3
100 - Philosophy & psychology
2
551 - Geology, hydrology & meteorology
2
581 - Specific topics in natural history
2
620 - Engineering & allied operations
2
900 - History & geography
2
304 - Factors affecting social behavior
1
320 - Political science
1
400 - Language
1
410 - Linguistics
1
612 - Human physiology
1
630 - Agriculture & related technologies
1
658 - General management
1
780 - Music
1
800 - Literature & rhetoric
1