Classification
551 - Geology, hydrology & meteorology
580 - Plants (Botany)
620 - Engineering & allied operations
000 - Computer science, information & general works
10
333 - Economics of land & energy
10
600 - Technology
10
363 - Other social problems & services
8
630 - Agriculture & related technologies
8
700 - The arts; fine & decorative arts
7
610 - Medicine & health
6
330 - Economics
5
380 - Commerce, communications & transportation
5
581 - Specific topics in natural history
4
140 - Specific philosophical schools
3
300 - Social sciences
3
320 - Political science
3
414 - Phonology & phonetics
3
500 - Natural sciences & mathematics
3
540 - Chemistry & allied sciences
3
576 - Genetics & evolution
3
612 - Human physiology
3
900 - History & geography
3
340 - Law
2
100 - Philosophy & psychology
1
658 - General management
1
720 - Architecture
1