Classification
100 - Philosophy & psychology
140 - Specific philosophical schools
340 - Law
170 - Ethics
19
320 - Political science
15
900 - History & geography
11
700 - The arts; fine & decorative arts
9
200 - Religion
8
370 - Education
6
300 - Social sciences
5
333 - Economics of land & energy
5
330 - Economics
4
576 - Genetics & evolution
4
610 - Medicine & health
4
301 - Sociology & anthropology
3
363 - Other social problems & services
3
400 - Language
3
530 - Physics
3
800 - Literature & rhetoric
3
000 - Computer science, information & general works
2
120 - Epistemology, causation & humankind
2
361 - Social problems & social welfare in general
2
380 - Commerce, communications & transportation
2
410 - Linguistics
2
500 - Natural sciences & mathematics
2
581 - Specific topics in natural history
2
600 - Technology
2
620 - Engineering & allied operations
2
297 - Islam, Babism & Bahai Faith
1
304 - Factors affecting social behavior
1
360 - Social problems & services; associations
1
580 - Plants (Botany)
1
630 - Agriculture & related technologies
1
770 - Photography, photographs & computer art
1