Classification
658 - General management
110
330 - Economics
102
370 - Education
44
331 - Labor economics
42
650 - Management & auxiliary services
42
700 - The arts; fine & decorative arts
37
900 - History & geography
30
300 - Social sciences
29
500 - Natural sciences & mathematics
29
610 - Medicine & health
29
000 - Computer science, information & general works
25
363 - Other social problems & services
24
301 - Sociology & anthropology
23
333 - Economics of land & energy
23
620 - Engineering & allied operations
23
140 - Specific philosophical schools
20
320 - Political science
19
600 - Technology
19
380 - Commerce, communications & transportation
18
005 - Computer programming, programs & data
17
384 - Communications; telecommunication
17
302 - Social interaction
15
158 - Applied psychology
11
100 - Philosophy & psychology
10
780 - Music
9
340 - Law
8
381 - Commerce
8
745 - Decorative arts
8
770 - Photography, photographs & computer art
8
800 - Literature & rhetoric
8
361 - Social problems & social welfare in general
7
670 - Manufacturing
7
791 - Public performances
7
808 - Rhetoric & collections of literature
7
304 - Factors affecting social behavior
6
400 - Language
6
570 - Life sciences; biology
6
004 - Data processing & computer science
5
006 - Special computer methods
5
150 - Psychology
5
170 - Ethics
5
332 - Financial economics
5
338 - Production
5
410 - Linguistics
5
551 - Geology, hydrology & meteorology
5
070 - News media, journalism & publishing
4
200 - Religion
4
741 - Drawing & drawings
4
297 - Islam, Babism & Bahai Faith
3
740 - Drawing & decorative arts
3
more ...