Classification
330 - Economics
658 - General management
300 - Social sciences
2,375
302 - Social interaction
2,283
338 - Production
2,094
500 - Natural sciences & mathematics
1,712
670 - Manufacturing
1,630
331 - Labor economics
1,511
381 - Commerce
1,314
650 - Management & auxiliary services
1,271
158 - Applied psychology
841
384 - Communications; telecommunication
779
332 - Financial economics
607
153 - Mental processes & intelligence
562
380 - Commerce, communications & transportation
526
000 - Computer science, information & general works
492
620 - Engineering & allied operations
353
005 - Computer programming, programs & data
300
368 - Insurance
210
001 - Knowledge
187
006 - Special computer methods
184
170 - Ethics
129
745 - Decorative arts
126
004 - Data processing & computer science
113
659 - Advertising & public relations
104
600 - Technology
95
150 - Psychology
90
700 - The arts; fine & decorative arts
87
808 - Rhetoric & collections of literature
86
333 - Economics of land & energy
83
303 - Social processes
80
363 - Other social problems & services
73
304 - Factors affecting social behavior
67
339 - Macroeconomics & related topics
64
610 - Medicine & health
55
519 - Probabilities & applied mathematics
54
510 - Mathematics
52
320 - Political science
51
011 - Bibliographies
40
174 - Occupational ethics
40
155 - Differential & developmental psychology
37
374 - Adult education
34
651 - Office services
33
800 - Literature & rhetoric
32
900 - History & geography
32
140 - Specific philosophical schools
28
580 - Plants (Botany)
23
657 - Accounting
22
370 - Education
21
364 - Criminology
19
more ...