Classification
000 - Computer science, information & general works
140 - Specific philosophical schools
333 - Economics of land & energy
4
700 - The arts; fine & decorative arts
4
330 - Economics
3
500 - Natural sciences & mathematics
3
320 - Political science
2
380 - Commerce, communications & transportation
2
576 - Genetics & evolution
2
600 - Technology
2
610 - Medicine & health
2
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
170 - Ethics
1
301 - Sociology & anthropology
1
340 - Law
1
363 - Other social problems & services
1
400 - Language
1
410 - Linguistics
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
658 - General management
1
900 - History & geography
1