Classification
330 - Economics
680
519 - Probabilities & applied mathematics
338
658 - General management
324
300 - Social sciences
240
338 - Production
127
302 - Social interaction
57
650 - Management & auxiliary services
48
500 - Natural sciences & mathematics
44
670 - Manufacturing
36
333 - Economics of land & energy
34
332 - Financial economics
33
320 - Political science
30
331 - Labor economics
24
000 - Computer science, information & general works
20
005 - Computer programming, programs & data
19
158 - Applied psychology
19
153 - Mental processes & intelligence
18
620 - Engineering & allied operations
18
004 - Data processing & computer science
17
170 - Ethics
17
340 - Law
17
368 - Insurance
16
381 - Commerce
16
003 - Systems
13
006 - Special computer methods
13
339 - Macroeconomics & related topics
13
380 - Commerce, communications & transportation
13
700 - The arts; fine & decorative arts
13
600 - Technology
12
301 - Sociology & anthropology
11
530 - Physics
10
001 - Knowledge
9
150 - Psychology
9
362 - Social welfare problems & services
9
370 - Education
9
510 - Mathematics
9
570 - Life sciences; biology
9
140 - Specific philosophical schools
8
174 - Occupational ethics
8
384 - Communications; telecommunication
8
657 - Accounting
8
900 - History & geography
8
304 - Factors affecting social behavior
7
350 - Public administration & military science
7
610 - Medicine & health
7
336 - Public finance
6
363 - Other social problems & services
6
346 - Private law
5
361 - Social problems & social welfare in general
4
378 - Higher education
4
more ...