Classification
500 - Natural sciences & mathematics
620 - Engineering & allied operations
720 - Architecture
600 - Technology
10
900 - History & geography
9
140 - Specific philosophical schools
7
700 - The arts; fine & decorative arts
7
363 - Other social problems & services
5
380 - Commerce, communications & transportation
5
576 - Genetics & evolution
5
000 - Computer science, information & general works
4
100 - Philosophy & psychology
4
540 - Chemistry & allied sciences
4
320 - Political science
3
330 - Economics
3
333 - Economics of land & energy
3
340 - Law
3
370 - Education
3
590 - Animals (Zoology)
3
610 - Medicine & health
2
657 - Accounting
2
120 - Epistemology, causation & humankind
1
300 - Social sciences
1
400 - Language
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
630 - Agriculture & related technologies
1
658 - General management
1
800 - Literature & rhetoric
1