Classification
650 - Management & auxiliary services
4,528
658 - General management
272
330 - Economics
77
338 - Production
56
332 - Financial economics
28
620 - Engineering & allied operations
25
150 - Psychology
22
336 - Public finance
22
340 - Law
21
346 - Private law
21
339 - Macroeconomics & related topics
18
343 - Military, tax, trade & industrial law
17
333 - Economics of land & energy
16
158 - Applied psychology
14
519 - Probabilities & applied mathematics
14
616 - Diseases
14
005 - Computer programming, programs & data
12
306 - Culture & institutions
12
501 - Philosophy & theory
12
624 - Civil engineering
12
320 - Political science
11
006 - Special computer methods
9
610 - Medicine & health
9
657 - Accounting
9
301 - Sociology & anthropology
8
337 - International economics
8
510 - Mathematics
8
670 - Manufacturing
8
302 - Social interaction
7
331 - Labor economics
7
621 - Applied physics
7
634 - Orchards, fruits & forestry
6
155 - Differential & developmental psychology
5
170 - Ethics
5
342 - Constitutional & administrative law
5
174 - Occupational ethics
4
300 - Social sciences
4
305 - Social groups
4
371 - Schools & their activities; special education
4
600 - Technology
4
629 - Other branches of engineering
4
004 - Data processing & computer science
3
344 - Labor, social, education & cultural law
3
363 - Other social problems & services
3
364 - Criminology
3
388 - Transportation; ground transportation
3
070 - News media, journalism & publishing
2
100 - Philosophy & psychology
2
111 - Ontology
2
353 - Specific fields of public administration
2
more ...