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