Classification
170 - Ethics
380 - Commerce, communications & transportation
700 - The arts; fine & decorative arts
140 - Specific philosophical schools
4
320 - Political science
4
100 - Philosophy & psychology
3
330 - Economics
3
340 - Law
3
600 - Technology
3
610 - Medicine & health
3
620 - Engineering & allied operations
3
900 - History & geography
3
000 - Computer science, information & general works
2
300 - Social sciences
2
333 - Economics of land & energy
2
363 - Other social problems & services
2
576 - Genetics & evolution
2
580 - Plants (Botany)
2
630 - Agriculture & related technologies
2
720 - Architecture
2
800 - Literature & rhetoric
2
350 - Public administration & military science
1
370 - Education
1
400 - Language
1
410 - Linguistics
1
414 - Phonology & phonetics
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
658 - General management
1