Classification
363 - Other social problems & services
380 - Commerce, communications & transportation
900 - History & geography
000 - Computer science, information & general works
4
333 - Economics of land & energy
4
700 - The arts; fine & decorative arts
4
330 - Economics
3
320 - Political science
2
600 - Technology
2
620 - Engineering & allied operations
2
140 - Specific philosophical schools
1
370 - Education
1
400 - Language
1
414 - Phonology & phonetics
1
530 - Physics
1
550 - Earth sciences
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
610 - Medicine & health
1
720 - Architecture
1