Classification
170 - Ethics
600 - Technology
100 - Philosophy & psychology
35
700 - The arts; fine & decorative arts
34
140 - Specific philosophical schools
27
610 - Medicine & health
27
000 - Computer science, information & general works
24
300 - Social sciences
24
620 - Engineering & allied operations
24
320 - Political science
20
330 - Economics
20
333 - Economics of land & energy
19
900 - History & geography
18
370 - Education
13
363 - Other social problems & services
11
340 - Law
10
200 - Religion
9
630 - Agriculture & related technologies
8
380 - Commerce, communications & transportation
7
500 - Natural sciences & mathematics
6
576 - Genetics & evolution
6
580 - Plants (Botany)
6
720 - Architecture
5
361 - Social problems & social welfare in general
4
530 - Physics
4
120 - Epistemology, causation & humankind
3
301 - Sociology & anthropology
3
364 - Criminology
3
551 - Geology, hydrology & meteorology
3
581 - Specific topics in natural history
3
800 - Literature & rhetoric
3
304 - Factors affecting social behavior
2
350 - Public administration & military science
2
360 - Social problems & services; associations
2
400 - Language
1
540 - Chemistry & allied sciences
1
590 - Animals (Zoology)
1
657 - Accounting
1
658 - General management
1