Classification
140 - Specific philosophical schools
370 - Education
380 - Commerce, communications & transportation
610 - Medicine & health
658 - General management
363 - Other social problems & services
3
000 - Computer science, information & general works
2
551 - Geology, hydrology & meteorology
2
576 - Genetics & evolution
2
700 - The arts; fine & decorative arts
2
900 - History & geography
2
170 - Ethics
1
330 - Economics
1
333 - Economics of land & energy
1
400 - Language
1
410 - Linguistics
1
580 - Plants (Botany)
1
600 - Technology
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1