Classification
200 - Religion
301 - Sociology & anthropology
363 - Other social problems & services
100 - Philosophy & psychology
7
300 - Social sciences
6
320 - Political science
6
700 - The arts; fine & decorative arts
5
900 - History & geography
5
000 - Computer science, information & general works
4
140 - Specific philosophical schools
4
581 - Specific topics in natural history
4
330 - Economics
3
610 - Medicine & health
3
297 - Islam, Babism & Bahai Faith
2
333 - Economics of land & energy
2
340 - Law
2
380 - Commerce, communications & transportation
2
600 - Technology
2
720 - Architecture
2
800 - Literature & rhetoric
2
120 - Epistemology, causation & humankind
1
170 - Ethics
1
361 - Social problems & social welfare in general
1
370 - Education
1
400 - Language
1
410 - Linguistics
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
620 - Engineering & allied operations
1
780 - Music
1