Classification
330 - Economics
1,152
338 - Production
229
331 - Labor economics
139
658 - General management
118
332 - Financial economics
74
333 - Economics of land & energy
50
339 - Macroeconomics & related topics
36
363 - Other social problems & services
36
380 - Commerce, communications & transportation
36
382 - International commerce
25
337 - International economics
24
336 - Public finance
22
306 - Culture & institutions
19
302 - Social interaction
13
364 - Criminology
11
340 - Law
10
320 - Political science
9
388 - Transportation; ground transportation
9
600 - Technology
9
384 - Communications; telecommunication
8
303 - Social processes
7
650 - Management & auxiliary services
7
378 - Higher education
6
301 - Sociology & anthropology
5
307 - Communities
5
360 - Social problems & services; associations
5
158 - Applied psychology
4
174 - Occupational ethics
4
304 - Factors affecting social behavior
4
346 - Private law
4
362 - Social welfare problems & services
4
370 - Education
4
381 - Commerce
4
383 - Postal communication
4
610 - Medicine & health
4
780 - Music
4
321 - Systems of governments & states
3
343 - Military, tax, trade & industrial law
3
500 - Natural sciences & mathematics
3
622 - Mining & related operations
3
910 - Geography & travel
3
297 - Islam, Babism & Bahai Faith
2
327 - International relations
2
350 - Public administration & military science
2
352 - General considerations of public administration
2
354 - Administration of economy & environment
2
368 - Insurance
2
570 - Life sciences; biology
2
577 - Ecology
2
628 - Sanitary & municipal engineering
2
more ...