Classification
658 - General management
1,990
338 - Production
1,330
330 - Economics
1,191
300 - Social sciences
453
302 - Social interaction
435
620 - Engineering & allied operations
313
000 - Computer science, information & general works
272
600 - Technology
264
333 - Economics of land & energy
260
500 - Natural sciences & mathematics
211
650 - Management & auxiliary services
185
670 - Manufacturing
185
700 - The arts; fine & decorative arts
176
320 - Political science
169
610 - Medicine & health
162
363 - Other social problems & services
156
331 - Labor economics
147
153 - Mental processes & intelligence
140
621 - Applied physics
134
384 - Communications; telecommunication
133
332 - Financial economics
124
004 - Data processing & computer science
111
380 - Commerce, communications & transportation
102
381 - Commerce
99
303 - Social processes
93
370 - Education
86
900 - History & geography
86
140 - Specific philosophical schools
85
005 - Computer programming, programs & data
83
158 - Applied psychology
76
630 - Agriculture & related technologies
67
006 - Special computer methods
66
629 - Other branches of engineering
66
540 - Chemistry & allied sciences
50
304 - Factors affecting social behavior
46
551 - Geology, hydrology & meteorology
44
547 - Organic chemistry
41
660 - Chemical engineering
39
580 - Plants (Botany)
38
745 - Decorative arts
34
001 - Knowledge
32
576 - Genetics & evolution
30
668 - Technology of other organic products
29
615 - Pharmacology & therapeutics
28
720 - Architecture
28
340 - Law
27
628 - Sanitary & municipal engineering
27
100 - Philosophy & psychology
26
657 - Accounting
25
160 - Logic
22
more ...