Classification
100 - Philosophy & psychology
330 - Economics
363 - Other social problems & services
333 - Economics of land & energy
14
320 - Political science
11
170 - Ethics
9
551 - Geology, hydrology & meteorology
8
581 - Specific topics in natural history
8
610 - Medicine & health
7
700 - The arts; fine & decorative arts
7
140 - Specific philosophical schools
6
000 - Computer science, information & general works
5
300 - Social sciences
5
658 - General management
4
200 - Religion
3
500 - Natural sciences & mathematics
3
580 - Plants (Botany)
3
600 - Technology
3
900 - History & geography
3
370 - Education
2
380 - Commerce, communications & transportation
2
576 - Genetics & evolution
2
800 - Literature & rhetoric
2
301 - Sociology & anthropology
1
340 - Law
1
350 - Public administration & military science
1
361 - Social problems & social welfare in general
1
410 - Linguistics
1
612 - Human physiology
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1