Classification
380 - Commerce, communications & transportation
600 - Technology
15
620 - Engineering & allied operations
11
900 - History & geography
11
700 - The arts; fine & decorative arts
10
363 - Other social problems & services
9
140 - Specific philosophical schools
8
320 - Political science
8
333 - Economics of land & energy
8
330 - Economics
7
000 - Computer science, information & general works
6
576 - Genetics & evolution
6
340 - Law
5
610 - Medicine & health
4
720 - Architecture
4
500 - Natural sciences & mathematics
3
170 - Ethics
2
361 - Social problems & social welfare in general
2
370 - Education
2
550 - Earth sciences
2
580 - Plants (Botany)
2
630 - Agriculture & related technologies
2
336 - Public finance
1
551 - Geology, hydrology & meteorology
1
612 - Human physiology
1
658 - General management
1
800 - Literature & rhetoric
1
920 - Biography, genealogy & insignia
1