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