Classification
100 - Philosophy & psychology
576 - Genetics & evolution
600 - Technology
900 - History & geography
300 - Social sciences
4
320 - Political science
3
330 - Economics
3
370 - Education
3
620 - Engineering & allied operations
3
140 - Specific philosophical schools
2
301 - Sociology & anthropology
2
340 - Law
2
120 - Epistemology, causation & humankind
1
333 - Economics of land & energy
1
350 - Public administration & military science
1
363 - Other social problems & services
1
400 - Language
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
581 - Specific topics in natural history
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1
658 - General management
1
700 - The arts; fine & decorative arts
1
720 - Architecture
1
780 - Music
1