Classification
330 - Economics
333 - Economics of land & energy
12
363 - Other social problems & services
12
551 - Geology, hydrology & meteorology
9
320 - Political science
8
600 - Technology
8
000 - Computer science, information & general works
5
620 - Engineering & allied operations
5
700 - The arts; fine & decorative arts
4
900 - History & geography
4
380 - Commerce, communications & transportation
3
630 - Agriculture & related technologies
3
140 - Specific philosophical schools
2
414 - Phonology & phonetics
2
530 - Physics
2
100 - Philosophy & psychology
1
170 - Ethics
1
300 - Social sciences
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
658 - General management
1