Classification
300 - Social sciences
330 - Economics
600 - Technology
363 - Other social problems & services
80
320 - Political science
54
170 - Ethics
15
340 - Law
13
900 - History & geography
12
100 - Philosophy & psychology
11
610 - Medicine & health
9
333 - Economics of land & energy
8
370 - Education
8
620 - Engineering & allied operations
8
000 - Computer science, information & general works
7
140 - Specific philosophical schools
7
380 - Commerce, communications & transportation
7
200 - Religion
3
650 - Management & auxiliary services
3
657 - Accounting
3
658 - General management
3
700 - The arts; fine & decorative arts
3
361 - Social problems & social welfare in general
2
576 - Genetics & evolution
2
120 - Epistemology, causation & humankind
1
301 - Sociology & anthropology
1
364 - Criminology
1
581 - Specific topics in natural history
1