Classification
330 - Economics
1,336
320 - Political science
736
300 - Social sciences
554
306 - Culture & institutions
270
900 - History & geography
240
304 - Factors affecting social behavior
235
301 - Sociology & anthropology
198
333 - Economics of land & energy
162
500 - Natural sciences & mathematics
151
305 - Social groups
137
370 - Education
137
363 - Other social problems & services
135
700 - The arts; fine & decorative arts
135
100 - Philosophy & psychology
124
303 - Social processes
119
006 - Special computer methods
108
005 - Computer programming, programs & data
102
600 - Technology
91
519 - Probabilities & applied mathematics
82
140 - Specific philosophical schools
80
302 - Social interaction
80
610 - Medicine & health
79
004 - Data processing & computer science
77
658 - General management
77
340 - Law
75
338 - Production
64
200 - Religion
62
000 - Computer science, information & general works
54
361 - Social problems & social welfare in general
52
170 - Ethics
51
380 - Commerce, communications & transportation
49
620 - Engineering & allied operations
48
371 - Schools & their activities; special education
47
331 - Labor economics
46
364 - Criminology
38
307 - Communities
36
025 - Library operations
35
003 - Systems
34
327 - International relations
33
400 - Language
30
621 - Applied physics
30
800 - Literature & rhetoric
30
630 - Agriculture & related technologies
29
297 - Islam, Babism & Bahai Faith
28
551 - Geology, hydrology & meteorology
28
324 - The political process
26
341 - Law of nations
23
323 - Civil & political rights
22
362 - Social welfare problems & services
22
410 - Linguistics
22
more ...