Classification
700 - The arts; fine & decorative arts
900 - History & geography
49
320 - Political science
45
330 - Economics
39
363 - Other social problems & services
17
800 - Literature & rhetoric
17
300 - Social sciences
16
720 - Architecture
16
400 - Language
14
780 - Music
11
140 - Specific philosophical schools
9
370 - Education
9
410 - Linguistics
9
100 - Philosophy & psychology
8
333 - Economics of land & energy
5
340 - Law
5
380 - Commerce, communications & transportation
5
610 - Medicine & health
5
304 - Factors affecting social behavior
4
000 - Computer science, information & general works
3
200 - Religion
3
301 - Sociology & anthropology
3
620 - Engineering & allied operations
3
630 - Agriculture & related technologies
3
551 - Geology, hydrology & meteorology
2
580 - Plants (Botany)
2
297 - Islam, Babism & Bahai Faith
1
530 - Physics
1
550 - Earth sciences
1
576 - Genetics & evolution
1
600 - Technology
1