Classification
304 - Factors affecting social behavior
700 - The arts; fine & decorative arts
900 - History & geography
35
320 - Political science
10
600 - Technology
10
330 - Economics
9
140 - Specific philosophical schools
8
620 - Engineering & allied operations
8
800 - Literature & rhetoric
8
380 - Commerce, communications & transportation
7
300 - Social sciences
6
363 - Other social problems & services
6
333 - Economics of land & energy
5
576 - Genetics & evolution
5
200 - Religion
4
340 - Law
4
780 - Music
4
000 - Computer science, information & general works
3
301 - Sociology & anthropology
3
370 - Education
3
400 - Language
3
630 - Agriculture & related technologies
3
770 - Photography, photographs & computer art
2
410 - Linguistics
1
580 - Plants (Botany)
1
610 - Medicine & health
1
720 - Architecture
1