Classification
330 - Economics
1,559
320 - Political science
580
610 - Medicine & health
536
658 - General management
365
370 - Education
223
005 - Computer programming, programs & data
205
333 - Economics of land & energy
205
304 - Factors affecting social behavior
171
340 - Law
168
300 - Social sciences
154
338 - Production
133
620 - Engineering & allied operations
123
363 - Other social problems & services
118
331 - Labor economics
117
500 - Natural sciences & mathematics
110
332 - Financial economics
109
616 - Diseases
106
600 - Technology
104
900 - History & geography
101
006 - Special computer methods
93
004 - Data processing & computer science
88
621 - Applied physics
87
650 - Management & auxiliary services
86
380 - Commerce, communications & transportation
78
302 - Social interaction
76
384 - Communications; telecommunication
64
630 - Agriculture & related technologies
60
158 - Applied psychology
56
700 - The arts; fine & decorative arts
53
336 - Public finance
49
670 - Manufacturing
49
153 - Mental processes & intelligence
46
342 - Constitutional & administrative law
46
341 - Law of nations
39
306 - Culture & institutions
38
374 - Adult education
37
364 - Criminology
36
381 - Commerce
35
301 - Sociology & anthropology
34
617 - Surgery & related medical specialties
30
745 - Decorative arts
30
000 - Computer science, information & general works
29
327 - International relations
29
346 - Private law
29
530 - Physics
29
551 - Geology, hydrology & meteorology
29
519 - Probabilities & applied mathematics
28
305 - Social groups
26
343 - Military, tax, trade & industrial law
26
001 - Knowledge
24
more ...