Classification
330 - Economics
658 - General management
670 - Manufacturing
1,629
300 - Social sciences
1,471
302 - Social interaction
1,457
500 - Natural sciences & mathematics
1,424
338 - Production
517
381 - Commerce
305
331 - Labor economics
285
650 - Management & auxiliary services
200
158 - Applied psychology
160
384 - Communications; telecommunication
158
620 - Engineering & allied operations
154
153 - Mental processes & intelligence
117
380 - Commerce, communications & transportation
109
332 - Financial economics
107
000 - Computer science, information & general works
67
001 - Knowledge
55
745 - Decorative arts
50
368 - Insurance
47
600 - Technology
47
150 - Psychology
46
700 - The arts; fine & decorative arts
40
333 - Economics of land & energy
38
006 - Special computer methods
29
363 - Other social problems & services
27
304 - Factors affecting social behavior
24
005 - Computer programming, programs & data
20
170 - Ethics
19
900 - History & geography
18
580 - Plants (Botany)
16
659 - Advertising & public relations
16
004 - Data processing & computer science
15
610 - Medicine & health
14
320 - Political science
13
510 - Mathematics
13
140 - Specific philosophical schools
12
576 - Genetics & evolution
11
374 - Adult education
10
519 - Probabilities & applied mathematics
9
303 - Social processes
8
800 - Literature & rhetoric
8
808 - Rhetoric & collections of literature
8
630 - Agriculture & related technologies
7
152 - Perception, movement, emotions & drives
6
155 - Differential & developmental psychology
6
370 - Education
5
551 - Geology, hydrology & meteorology
5
720 - Architecture
5
781 - General principles & musical forms
4
more ...