Classification
658 - General management
330 - Economics
180
338 - Production
97
300 - Social sciences
59
331 - Labor economics
59
500 - Natural sciences & mathematics
53
302 - Social interaction
51
381 - Commerce
47
670 - Manufacturing
31
332 - Financial economics
29
000 - Computer science, information & general works
28
650 - Management & auxiliary services
27
001 - Knowledge
21
005 - Computer programming, programs & data
21
610 - Medicine & health
20
380 - Commerce, communications & transportation
19
158 - Applied psychology
18
363 - Other social problems & services
18
620 - Engineering & allied operations
18
384 - Communications; telecommunication
16
303 - Social processes
15
700 - The arts; fine & decorative arts
13
333 - Economics of land & energy
11
153 - Mental processes & intelligence
10
600 - Technology
10
745 - Decorative arts
9
140 - Specific philosophical schools
8
368 - Insurance
8
374 - Adult education
8
170 - Ethics
7
006 - Special computer methods
6
364 - Criminology
6
011 - Bibliographies
5
304 - Factors affecting social behavior
5
659 - Advertising & public relations
5
336 - Public finance
4
352 - General considerations of public administration
4
551 - Geology, hydrology & meteorology
4
740 - Drawing & decorative arts
4
741 - Drawing & drawings
4
800 - Literature & rhetoric
4
004 - Data processing & computer science
3
361 - Social problems & social welfare in general
3
362 - Social welfare problems & services
3
370 - Education
3
576 - Genetics & evolution
3
580 - Plants (Botany)
3
900 - History & geography
3
301 - Sociology & anthropology
2
305 - Social groups
2
more ...