Classification
380 - Commerce, communications & transportation
19
600 - Technology
700 - The arts; fine & decorative arts
720 - Architecture
900 - History & geography
16
620 - Engineering & allied operations
13
363 - Other social problems & services
11
000 - Computer science, information & general works
9
333 - Economics of land & energy
9
320 - Political science
7
610 - Medicine & health
7
140 - Specific philosophical schools
6
330 - Economics
5
340 - Law
5
370 - Education
4
500 - Natural sciences & mathematics
4
551 - Geology, hydrology & meteorology
4
576 - Genetics & evolution
4
400 - Language
3
658 - General management
3
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
580 - Plants (Botany)
1
612 - Human physiology
1
800 - Literature & rhetoric
1