Classification
658 - General management
330 - Economics
2,101
670 - Manufacturing
1,895
300 - Social sciences
1,539
302 - Social interaction
1,517
500 - Natural sciences & mathematics
1,478
338 - Production
667
381 - Commerce
383
331 - Labor economics
339
650 - Management & auxiliary services
244
620 - Engineering & allied operations
226
000 - Computer science, information & general works
176
158 - Applied psychology
176
384 - Communications; telecommunication
176
332 - Financial economics
145
153 - Mental processes & intelligence
132
380 - Commerce, communications & transportation
118
745 - Decorative arts
106
150 - Psychology
78
001 - Knowledge
64
600 - Technology
62
368 - Insurance
53
700 - The arts; fine & decorative arts
52
333 - Economics of land & energy
44
005 - Computer programming, programs & data
39
006 - Special computer methods
37
004 - Data processing & computer science
36
363 - Other social problems & services
31
304 - Factors affecting social behavior
25
659 - Advertising & public relations
20
900 - History & geography
20
374 - Adult education
18
170 - Ethics
17
580 - Plants (Botany)
17
510 - Mathematics
16
610 - Medicine & health
16
303 - Social processes
15
519 - Probabilities & applied mathematics
15
621 - Applied physics
15
140 - Specific philosophical schools
13
320 - Political science
13
576 - Genetics & evolution
12
629 - Other branches of engineering
11
741 - Drawing & drawings
9
781 - General principles & musical forms
9
800 - Literature & rhetoric
9
152 - Perception, movement, emotions & drives
8
808 - Rhetoric & collections of literature
8
720 - Architecture
7
780 - Music
7
more ...