Classification
650 - Management & auxiliary services
612
658 - General management
192
330 - Economics
29
338 - Production
24
332 - Financial economics
18
158 - Applied psychology
12
336 - Public finance
12
657 - Accounting
11
306 - Culture & institutions
10
339 - Macroeconomics & related topics
10
150 - Psychology
9
519 - Probabilities & applied mathematics
8
624 - Civil engineering
8
346 - Private law
6
005 - Computer programming, programs & data
5
004 - Data processing & computer science
4
170 - Ethics
4
174 - Occupational ethics
4
333 - Economics of land & energy
4
340 - Law
4
302 - Social interaction
3
337 - International economics
3
371 - Schools & their activities; special education
3
620 - Engineering & allied operations
3
621 - Applied physics
3
630 - Agriculture & related technologies
3
670 - Manufacturing
3
300 - Social sciences
2
305 - Social groups
2
343 - Military, tax, trade & industrial law
2
361 - Social problems & social welfare in general
2
500 - Natural sciences & mathematics
2
510 - Mathematics
2
550 - Earth sciences
2
610 - Medicine & health
2
616 - Diseases
2
003 - Systems
1
006 - Special computer methods
1
025 - Library operations
1
100 - Philosophy & psychology
1
111 - Ontology
1
160 - Logic
1
301 - Sociology & anthropology
1
307 - Communities
1
341 - Law of nations
1
342 - Constitutional & administrative law
1
344 - Labor, social, education & cultural law
1
353 - Specific fields of public administration
1
364 - Criminology
1
370 - Education
1
more ...