Classification
140 - Specific philosophical schools
330 - Economics
363 - Other social problems & services
700 - The arts; fine & decorative arts
720 - Architecture
380 - Commerce, communications & transportation
6
900 - History & geography
5
000 - Computer science, information & general works
4
370 - Education
4
600 - Technology
4
610 - Medicine & health
4
620 - Engineering & allied operations
4
320 - Political science
3
333 - Economics of land & energy
2
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
300 - Social sciences
1
301 - Sociology & anthropology
1
340 - Law
1
400 - Language
1
550 - Earth sciences
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
658 - General management
1
800 - Literature & rhetoric
1