Classification
100 - Philosophy & psychology
300 - Social sciences
301 - Sociology & anthropology
320 - Political science
900 - History & geography
15
200 - Religion
10
330 - Economics
8
140 - Specific philosophical schools
7
340 - Law
7
370 - Education
7
363 - Other social problems & services
6
700 - The arts; fine & decorative arts
6
000 - Computer science, information & general works
5
170 - Ethics
5
333 - Economics of land & energy
5
610 - Medicine & health
5
581 - Specific topics in natural history
4
600 - Technology
4
400 - Language
3
410 - Linguistics
3
576 - Genetics & evolution
3
364 - Criminology
2
120 - Epistemology, causation & humankind
1
297 - Islam, Babism & Bahai Faith
1
304 - Factors affecting social behavior
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
530 - Physics
1
620 - Engineering & allied operations
1
720 - Architecture
1
800 - Literature & rhetoric
1