Classification
530 - Physics
100 - Philosophy & psychology
12
370 - Education
8
200 - Religion
6
120 - Epistemology, causation & humankind
4
600 - Technology
4
700 - The arts; fine & decorative arts
4
140 - Specific philosophical schools
3
400 - Language
3
170 - Ethics
2
300 - Social sciences
2
301 - Sociology & anthropology
2
320 - Political science
2
333 - Economics of land & energy
2
500 - Natural sciences & mathematics
2
581 - Specific topics in natural history
2
000 - Computer science, information & general works
1
297 - Islam, Babism & Bahai Faith
1
304 - Factors affecting social behavior
1
340 - Law
1
363 - Other social problems & services
1
410 - Linguistics
1
414 - Phonology & phonetics
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
620 - Engineering & allied operations
1
900 - History & geography
1