Classification
200 - Religion
330 - Economics
320 - Political science
58
900 - History & geography
16
100 - Philosophy & psychology
13
300 - Social sciences
8
170 - Ethics
7
140 - Specific philosophical schools
6
301 - Sociology & anthropology
4
333 - Economics of land & energy
3
340 - Law
3
370 - Education
3
600 - Technology
3
363 - Other social problems & services
2
530 - Physics
2
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
620 - Engineering & allied operations
2
297 - Islam, Babism & Bahai Faith
1
380 - Commerce, communications & transportation
1
400 - Language
1
410 - Linguistics
1
551 - Geology, hydrology & meteorology
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1
700 - The arts; fine & decorative arts
1