Classification
330 - Economics
540 - Chemistry & allied sciences
600 - Technology
17
620 - Engineering & allied operations
17
700 - The arts; fine & decorative arts
11
363 - Other social problems & services
10
333 - Economics of land & energy
5
580 - Plants (Botany)
3
610 - Medicine & health
3
630 - Agriculture & related technologies
3
340 - Law
2
500 - Natural sciences & mathematics
2
900 - History & geography
2
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
300 - Social sciences
1
301 - Sociology & anthropology
1
320 - Political science
1
414 - Phonology & phonetics
1
720 - Architecture
1
800 - Literature & rhetoric
1