Classification
302 - Social interaction
404
331 - Labor economics
386
006 - Special computer methods
384
330 - Economics
206
658 - General management
197
381 - Commerce
128
000 - Computer science, information & general works
98
700 - The arts; fine & decorative arts
63
380 - Commerce, communications & transportation
54
600 - Technology
54
500 - Natural sciences & mathematics
49
338 - Production
43
745 - Decorative arts
43
333 - Economics of land & energy
41
610 - Medicine & health
39
363 - Other social problems & services
37
370 - Education
37
303 - Social processes
36
650 - Management & auxiliary services
35
384 - Communications; telecommunication
33
320 - Political science
32
620 - Engineering & allied operations
32
659 - Advertising & public relations
32
140 - Specific philosophical schools
31
300 - Social sciences
31
900 - History & geography
30
576 - Genetics & evolution
16
004 - Data processing & computer science
15
100 - Philosophy & psychology
14
551 - Geology, hydrology & meteorology
14
005 - Computer programming, programs & data
13
400 - Language
12
158 - Applied psychology
11
340 - Law
11
670 - Manufacturing
11
800 - Literature & rhetoric
8
720 - Architecture
7
770 - Photography, photographs & computer art
7
304 - Factors affecting social behavior
6
630 - Agriculture & related technologies
6
301 - Sociology & anthropology
5
580 - Plants (Botany)
5
581 - Specific topics in natural history
5
780 - Music
5
001 - Knowledge
4
200 - Religion
4
170 - Ethics
3
410 - Linguistics
3
520 - Astronomy & allied sciences
3
540 - Chemistry & allied sciences
3
more ...