Classification
100 - Philosophy & psychology
610 - Medicine & health
21
333 - Economics of land & energy
13
330 - Economics
11
363 - Other social problems & services
9
370 - Education
9
700 - The arts; fine & decorative arts
9
140 - Specific philosophical schools
6
600 - Technology
6
000 - Computer science, information & general works
5
320 - Political science
5
620 - Engineering & allied operations
5
170 - Ethics
4
380 - Commerce, communications & transportation
4
500 - Natural sciences & mathematics
4
581 - Specific topics in natural history
3
200 - Religion
2
361 - Social problems & social welfare in general
2
551 - Geology, hydrology & meteorology
2
612 - Human physiology
2
630 - Agriculture & related technologies
2
780 - Music
2
900 - History & geography
2
296 - Judaism
1
304 - Factors affecting social behavior
1
340 - Law
1
400 - Language
1
580 - Plants (Botany)
1
658 - General management
1
791 - Public performances
1
800 - Literature & rhetoric
1