Classification
330 - Economics
1,633
320 - Political science
702
900 - History & geography
316
340 - Law
227
300 - Social sciences
190
370 - Education
160
338 - Production
148
820 - English & Old English literatures
140
700 - The arts; fine & decorative arts
121
333 - Economics of land & energy
117
306 - Culture & institutions
116
100 - Philosophy & psychology
111
327 - International relations
103
200 - Religion
76
305 - Social groups
76
304 - Factors affecting social behavior
75
658 - General management
75
301 - Sociology & anthropology
72
800 - Literature & rhetoric
72
610 - Medicine & health
68
140 - Specific philosophical schools
65
337 - International economics
54
170 - Ethics
52
600 - Technology
45
342 - Constitutional & administrative law
44
363 - Other social problems & services
44
302 - Social interaction
43
341 - Law of nations
43
380 - Commerce, communications & transportation
43
500 - Natural sciences & mathematics
41
616 - Diseases
40
332 - Financial economics
37
339 - Macroeconomics & related topics
37
303 - Social processes
35
331 - Labor economics
35
510 - Mathematics
35
000 - Computer science, information & general works
33
323 - Civil & political rights
31
364 - Criminology
31
620 - Engineering & allied operations
31
630 - Agriculture & related technologies
30
382 - International commerce
29
400 - Language
29
006 - Special computer methods
28
230 - Christianity & Christian theology
27
361 - Social problems & social welfare in general
27
650 - Management & auxiliary services
27
297 - Islam, Babism & Bahai Faith
26
324 - The political process
26
005 - Computer programming, programs & data
25
more ...