Classification
100 - Philosophy & psychology
576 - Genetics & evolution
600 - Technology
900 - History & geography
300 - Social sciences
4
320 - Political science
4
330 - Economics
4
370 - Education
3
620 - Engineering & allied operations
3
140 - Specific philosophical schools
2
301 - Sociology & anthropology
2
333 - Economics of land & energy
2
340 - Law
2
363 - Other social problems & services
2
700 - The arts; fine & decorative arts
2
120 - Epistemology, causation & humankind
1
350 - Public administration & military science
1
380 - Commerce, communications & transportation
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
658 - General management
1
720 - Architecture
1
780 - Music
1