Classification
100 - Philosophy & psychology
300 - Social sciences
320 - Political science
900 - History & geography
340 - Law
12
301 - Sociology & anthropology
11
200 - Religion
10
330 - Economics
10
140 - Specific philosophical schools
8
700 - The arts; fine & decorative arts
7
333 - Economics of land & energy
6
370 - Education
6
600 - Technology
6
400 - Language
5
410 - Linguistics
5
620 - Engineering & allied operations
5
780 - Music
5
000 - Computer science, information & general works
4
170 - Ethics
3
576 - Genetics & evolution
3
610 - Medicine & health
3
770 - Photography, photographs & computer art
3
120 - Epistemology, causation & humankind
2
361 - Social problems & social welfare in general
2
363 - Other social problems & services
2
380 - Commerce, communications & transportation
2
500 - Natural sciences & mathematics
2
530 - Physics
2
581 - Specific topics in natural history
2
720 - Architecture
2
800 - Literature & rhetoric
2
304 - Factors affecting social behavior
1
360 - Social problems & services; associations
1
364 - Criminology
1
630 - Agriculture & related technologies
1
658 - General management
1