Classification
140 - Specific philosophical schools
620 - Engineering & allied operations
600 - Technology
18
700 - The arts; fine & decorative arts
15
610 - Medicine & health
11
363 - Other social problems & services
10
380 - Commerce, communications & transportation
10
900 - History & geography
9
000 - Computer science, information & general works
8
330 - Economics
7
333 - Economics of land & energy
7
630 - Agriculture & related technologies
4
370 - Education
2
551 - Geology, hydrology & meteorology
2
576 - Genetics & evolution
2
580 - Plants (Botany)
2
581 - Specific topics in natural history
2
658 - General management
2
800 - Literature & rhetoric
2
100 - Philosophy & psychology
1
300 - Social sciences
1
320 - Political science
1
361 - Social problems & social welfare in general
1
540 - Chemistry & allied sciences
1