Classification
300 - Social sciences
340 - Law
610 - Medicine & health
700 - The arts; fine & decorative arts
800 - Literature & rhetoric
4
900 - History & geography
4
140 - Specific philosophical schools
3
363 - Other social problems & services
3
380 - Commerce, communications & transportation
3
600 - Technology
3
620 - Engineering & allied operations
3
720 - Architecture
3
170 - Ethics
2
333 - Economics of land & energy
2
576 - Genetics & evolution
2
580 - Plants (Botany)
2
630 - Agriculture & related technologies
2
100 - Philosophy & psychology
1
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
330 - Economics
1
370 - Education
1