Classification
333 - Economics of land & energy
576 - Genetics & evolution
700 - The arts; fine & decorative arts
380 - Commerce, communications & transportation
13
620 - Engineering & allied operations
13
600 - Technology
12
000 - Computer science, information & general works
10
580 - Plants (Botany)
8
900 - History & geography
8
500 - Natural sciences & mathematics
7
610 - Medicine & health
7
330 - Economics
6
363 - Other social problems & services
6
140 - Specific philosophical schools
5
540 - Chemistry & allied sciences
4
300 - Social sciences
3
340 - Law
3
414 - Phonology & phonetics
3
530 - Physics
3
551 - Geology, hydrology & meteorology
3
581 - Specific topics in natural history
3
612 - Human physiology
3
720 - Architecture
3
100 - Philosophy & psychology
2
630 - Agriculture & related technologies
2
800 - Literature & rhetoric
2
304 - Factors affecting social behavior
1
320 - Political science
1
650 - Management & auxiliary services
1