Classification
170 - Ethics
600 - Technology
700 - The arts; fine & decorative arts
140 - Specific philosophical schools
13
610 - Medicine & health
10
620 - Engineering & allied operations
9
333 - Economics of land & energy
8
000 - Computer science, information & general works
7
900 - History & geography
7
320 - Political science
6
340 - Law
6
363 - Other social problems & services
6
100 - Philosophy & psychology
5
370 - Education
4
576 - Genetics & evolution
4
580 - Plants (Botany)
4
330 - Economics
3
380 - Commerce, communications & transportation
3
720 - Architecture
3
800 - Literature & rhetoric
3
200 - Religion
2
300 - Social sciences
2
361 - Social problems & social welfare in general
2
500 - Natural sciences & mathematics
2
530 - Physics
2
551 - Geology, hydrology & meteorology
2
630 - Agriculture & related technologies
2
120 - Epistemology, causation & humankind
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
350 - Public administration & military science
1
581 - Specific topics in natural history
1
612 - Human physiology
1
658 - General management
1