Classification
140 - Specific philosophical schools
363 - Other social problems & services
658 - General management
600 - Technology
9
610 - Medicine & health
9
330 - Economics
8
333 - Economics of land & energy
8
000 - Computer science, information & general works
7
700 - The arts; fine & decorative arts
7
380 - Commerce, communications & transportation
6
551 - Geology, hydrology & meteorology
5
620 - Engineering & allied operations
5
630 - Agriculture & related technologies
5
370 - Education
4
576 - Genetics & evolution
3
580 - Plants (Botany)
3
900 - History & geography
3
320 - Political science
2
361 - Social problems & social welfare in general
2
581 - Specific topics in natural history
2
297 - Islam, Babism & Bahai Faith
1
300 - Social sciences
1
336 - Public finance
1
400 - Language
1
410 - Linguistics
1
720 - Architecture
1
800 - Literature & rhetoric
1