Classification
153 - Mental processes & intelligence
658 - General management
783
330 - Economics
680
650 - Management & auxiliary services
359
302 - Social interaction
244
300 - Social sciences
230
338 - Production
195
158 - Applied psychology
187
500 - Natural sciences & mathematics
187
331 - Labor economics
125
670 - Manufacturing
111
000 - Computer science, information & general works
108
384 - Communications; telecommunication
98
006 - Special computer methods
55
150 - Psychology
50
620 - Engineering & allied operations
45
332 - Financial economics
42
381 - Commerce
41
380 - Commerce, communications & transportation
38
155 - Differential & developmental psychology
35
745 - Decorative arts
31
005 - Computer programming, programs & data
28
001 - Knowledge
21
303 - Social processes
15
510 - Mathematics
13
519 - Probabilities & applied mathematics
11
368 - Insurance
9
808 - Rhetoric & collections of literature
8
170 - Ethics
7
339 - Macroeconomics & related topics
7
011 - Bibliographies
6
152 - Perception, movement, emotions & drives
6
370 - Education
6
621 - Applied physics
6
700 - The arts; fine & decorative arts
6
600 - Technology
5
003 - Systems
4
179 - Other ethical norms
4
770 - Photography, photographs & computer art
4
352 - General considerations of public administration
3
371 - Schools & their activities; special education
3
659 - Advertising & public relations
3
004 - Data processing & computer science
2
248 - Christian experience, practice & life
2
307 - Communities
2
612 - Human physiology
2
744 - [Unassigned]
2
796 - Athletic & outdoor sports & games
2
154 - Subconscious & altered states
1
177 - Ethics of social relations
1
more ...