Classification
140 - Specific philosophical schools
330 - Economics
363 - Other social problems & services
7
380 - Commerce, communications & transportation
720 - Architecture
700 - The arts; fine & decorative arts
6
000 - Computer science, information & general works
5
900 - History & geography
5
600 - Technology
4
620 - Engineering & allied operations
4
370 - Education
3
610 - Medicine & health
3
320 - Political science
2
333 - Economics of land & energy
2
551 - Geology, hydrology & meteorology
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
576 - Genetics & evolution
1
580 - Plants (Botany)
1
658 - General management
1
800 - Literature & rhetoric
1