Classification
320 - Political science
516
330 - Economics
261
340 - Law
178
610 - Medicine & health
175
540 - Chemistry & allied sciences
66
302 - Social interaction
60
900 - History & geography
56
658 - General management
49
351 - Public administration
48
614 - Incidence & prevention of disease
46
520 - Astronomy & allied sciences
43
613 - Personal health & safety
43
500 - Natural sciences & mathematics
42
304 - Factors affecting social behavior
39
306 - Culture & institutions
39
600 - Technology
38
338 - Production
33
301 - Sociology & anthropology
30
333 - Economics of land & energy
30
370 - Education
29
300 - Social sciences
28
100 - Philosophy & psychology
25
363 - Other social problems & services
24
000 - Computer science, information & general works
23
700 - The arts; fine & decorative arts
22
621 - Applied physics
21
352 - General considerations of public administration
19
350 - Public administration & military science
18
150 - Psychology
17
327 - International relations
17
364 - Criminology
17
910 - Geography & travel
17
616 - Diseases
16
512 - Algebra
15
006 - Special computer methods
13
341 - Law of nations
12
343 - Military, tax, trade & industrial law
12
361 - Social problems & social welfare in general
12
336 - Public finance
11
549 - Mineralogy
11
650 - Management & auxiliary services
11
170 - Ethics
10
362 - Social welfare problems & services
10
515 - Analysis
9
657 - Accounting
9
307 - Communities
8
331 - Labor economics
8
516 - Geometry
8
303 - Social processes
7
380 - Commerce, communications & transportation
7
more ...