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