Classification
330 - Economics
761
155 - Differential & developmental psychology
480
658 - General management
425
610 - Medicine & health
386
158 - Applied psychology
376
340 - Law
344
332 - Financial economics
311
320 - Political science
273
339 - Macroeconomics & related topics
261
302 - Social interaction
238
650 - Management & auxiliary services
218
370 - Education
205
004 - Data processing & computer science
190
700 - The arts; fine & decorative arts
185
150 - Psychology
175
300 - Social sciences
174
900 - History & geography
172
333 - Economics of land & energy
157
820 - English & Old English literatures
157
000 - Computer science, information & general works
152
616 - Diseases
140
100 - Philosophy & psychology
130
140 - Specific philosophical schools
110
600 - Technology
100
005 - Computer programming, programs & data
95
153 - Mental processes & intelligence
95
363 - Other social problems & services
92
301 - Sociology & anthropology
88
331 - Labor economics
86
500 - Natural sciences & mathematics
75
380 - Commerce, communications & transportation
69
170 - Ethics
64
620 - Engineering & allied operations
61
306 - Culture & institutions
54
338 - Production
51
200 - Religion
45
400 - Language
44
384 - Communications; telecommunication
41
006 - Special computer methods
40
576 - Genetics & evolution
37
361 - Social problems & social welfare in general
35
570 - Life sciences; biology
34
381 - Commerce
29
800 - Literature & rhetoric
29
303 - Social processes
26
305 - Social groups
26
580 - Plants (Botany)
26
612 - Human physiology
26
940 - History of Europe
25
970 - History of North America
24
more ...