Classification
170 - Ethics
620 - Engineering & allied operations
600 - Technology
23
330 - Economics
14
320 - Political science
13
610 - Medicine & health
12
100 - Philosophy & psychology
11
700 - The arts; fine & decorative arts
11
140 - Specific philosophical schools
10
340 - Law
10
000 - Computer science, information & general works
9
333 - Economics of land & energy
9
900 - History & geography
9
363 - Other social problems & services
8
630 - Agriculture & related technologies
8
380 - Commerce, communications & transportation
5
720 - Architecture
5
300 - Social sciences
4
551 - Geology, hydrology & meteorology
4
580 - Plants (Botany)
4
576 - Genetics & evolution
3
581 - Specific topics in natural history
3
174 - Occupational ethics
2
361 - Social problems & social welfare in general
2
364 - Criminology
2
370 - Education
2
400 - Language
2
530 - Physics
2
658 - General management
2
800 - Literature & rhetoric
2
001 - Knowledge
1
120 - Epistemology, causation & humankind
1
200 - Religion
1
338 - Production
1
414 - Phonology & phonetics
1
660 - Chemical engineering
1