Classification
900 - History & geography
66
320 - Political science
65
610 - Medicine & health
40
355 - Military science
36
363 - Other social problems & services
22
700 - The arts; fine & decorative arts
22
000 - Computer science, information & general works
18
300 - Social sciences
17
140 - Specific philosophical schools
15
600 - Technology
15
100 - Philosophy & psychology
12
333 - Economics of land & energy
11
170 - Ethics
10
330 - Economics
9
358 - Air & other specialized forces
9
200 - Religion
7
340 - Law
7
364 - Criminology
7
380 - Commerce, communications & transportation
7
301 - Sociology & anthropology
6
331 - Labor economics
5
350 - Public administration & military science
5
551 - Geology, hydrology & meteorology
5
620 - Engineering & allied operations
5
303 - Social processes
4
570 - Life sciences; biology
4
576 - Genetics & evolution
4
005 - Computer programming, programs & data
3
120 - Epistemology, causation & humankind
3
341 - Law of nations
3
361 - Social problems & social welfare in general
3
500 - Natural sciences & mathematics
3
540 - Chemistry & allied sciences
3
581 - Specific topics in natural history
3
623 - Military & nautical engineering
3
304 - Factors affecting social behavior
2
327 - International relations
2
359 - Sea forces & warfare
2
370 - Education
2
614 - Incidence & prevention of disease
2
616 - Diseases
2
658 - General management
2
940 - History of Europe
2
970 - History of North America
2
001 - Knowledge
1
172 - Political ethics
1
174 - Occupational ethics
1
230 - Christianity & Christian theology
1
297 - Islam, Babism & Bahai Faith
1
299 - Religions not provided for elsewhere
1
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