Classification
300 - Social sciences
330 - Economics
658 - General management
302 - Social interaction
1,902
500 - Natural sciences & mathematics
1,423
670 - Manufacturing
1,402
338 - Production
611
331 - Labor economics
538
650 - Management & auxiliary services
302
381 - Commerce
273
384 - Communications; telecommunication
220
158 - Applied psychology
213
153 - Mental processes & intelligence
187
380 - Commerce, communications & transportation
123
332 - Financial economics
73
620 - Engineering & allied operations
72
001 - Knowledge
52
745 - Decorative arts
47
368 - Insurance
40
000 - Computer science, information & general works
30
170 - Ethics
26
150 - Psychology
23
659 - Advertising & public relations
20
303 - Social processes
19
006 - Special computer methods
17
510 - Mathematics
16
155 - Differential & developmental psychology
12
005 - Computer programming, programs & data
10
304 - Factors affecting social behavior
10
519 - Probabilities & applied mathematics
10
808 - Rhetoric & collections of literature
10
362 - Social welfare problems & services
8
004 - Data processing & computer science
7
152 - Perception, movement, emotions & drives
7
374 - Adult education
7
600 - Technology
7
320 - Political science
5
610 - Medicine & health
5
700 - The arts; fine & decorative arts
5
100 - Philosophy & psychology
4
174 - Occupational ethics
4
340 - Law
4
370 - Education
4
800 - Literature & rhetoric
4
011 - Bibliographies
3
364 - Criminology
3
900 - History & geography
3
305 - Social groups
2
333 - Economics of land & energy
2
337 - International economics
2
more ...