Classification
330 - Economics
320 - Political science
42,326
658 - General management
7,967
300 - Social sciences
5,855
340 - Law
4,956
900 - History & geography
4,292
338 - Production
2,740
302 - Social interaction
2,364
500 - Natural sciences & mathematics
2,084
700 - The arts; fine & decorative arts
1,895
331 - Labor economics
1,824
333 - Economics of land & energy
1,736
630 - Agriculture & related technologies
1,711
610 - Medicine & health
1,695
332 - Financial economics
1,572
650 - Management & auxiliary services
1,571
670 - Manufacturing
1,562
381 - Commerce
1,423
000 - Computer science, information & general works
1,382
600 - Technology
1,272
380 - Commerce, communications & transportation
1,196
363 - Other social problems & services
1,190
158 - Applied psychology
1,119
370 - Education
987
384 - Communications; telecommunication
949
304 - Factors affecting social behavior
891
620 - Engineering & allied operations
844
005 - Computer programming, programs & data
759
153 - Mental processes & intelligence
660
170 - Ethics
490
576 - Genetics & evolution
477
200 - Religion
468
140 - Specific philosophical schools
410
800 - Literature & rhetoric
321
006 - Special computer methods
294
100 - Philosophy & psychology
280
551 - Geology, hydrology & meteorology
233
657 - Accounting
233
001 - Knowledge
228
368 - Insurance
215
580 - Plants (Botany)
190
004 - Data processing & computer science
183
336 - Public finance
178
745 - Decorative arts
172
808 - Rhetoric & collections of literature
166
339 - Macroeconomics & related topics
158
659 - Advertising & public relations
141
720 - Architecture
133
150 - Psychology
120
581 - Specific topics in natural history
116
more ...