Classification
000 - Computer science, information & general works
170 - Ethics
380 - Commerce, communications & transportation
140 - Specific philosophical schools
5
330 - Economics
5
370 - Education
5
600 - Technology
5
610 - Medicine & health
5
320 - Political science
4
620 - Engineering & allied operations
4
700 - The arts; fine & decorative arts
3
900 - History & geography
3
300 - Social sciences
2
340 - Law
2
363 - Other social problems & services
2
551 - Geology, hydrology & meteorology
2
100 - Philosophy & psychology
1
200 - Religion
1
361 - Social problems & social welfare in general
1
400 - Language
1
414 - Phonology & phonetics
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1
658 - General management
1
920 - Biography, genealogy & insignia
1