Classification
100 - Philosophy & psychology
576 - Genetics & evolution
620 - Engineering & allied operations
300 - Social sciences
3
370 - Education
3
600 - Technology
3
700 - The arts; fine & decorative arts
3
900 - History & geography
3
140 - Specific philosophical schools
2
301 - Sociology & anthropology
2
330 - Economics
2
333 - Economics of land & energy
2
380 - Commerce, communications & transportation
2
580 - Plants (Botany)
2
610 - Medicine & health
2
320 - Political science
1
340 - Law
1
400 - Language
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
630 - Agriculture & related technologies
1
658 - General management
1
720 - Architecture
1
780 - Music
1