Classification
380 - Commerce, communications & transportation
500 - Natural sciences & mathematics
600 - Technology
700 - The arts; fine & decorative arts
620 - Engineering & allied operations
16
000 - Computer science, information & general works
14
333 - Economics of land & energy
12
900 - History & geography
11
140 - Specific philosophical schools
8
363 - Other social problems & services
7
576 - Genetics & evolution
7
330 - Economics
6
610 - Medicine & health
6
720 - Architecture
5
320 - Political science
4
340 - Law
4
370 - Education
2
410 - Linguistics
2
530 - Physics
2
540 - Chemistry & allied sciences
2
630 - Agriculture & related technologies
2
658 - General management
2
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
160 - Logic
1
580 - Plants (Botany)
1
612 - Human physiology
1
780 - Music
1
800 - Literature & rhetoric
1