Classification
331 - Labor economics
346
658 - General management
143
330 - Economics
139
650 - Management & auxiliary services
118
005 - Computer programming, programs & data
53
158 - Applied psychology
53
620 - Engineering & allied operations
49
381 - Commerce
42
500 - Natural sciences & mathematics
35
004 - Data processing & computer science
29
384 - Communications; telecommunication
25
502 - Miscellany
23
000 - Computer science, information & general works
22
745 - Decorative arts
21
770 - Photography, photographs & computer art
21
302 - Social interaction
20
300 - Social sciences
16
621 - Applied physics
15
320 - Political science
14
741 - Drawing & drawings
14
540 - Chemistry & allied sciences
12
006 - Special computer methods
11
610 - Medicine & health
11
380 - Commerce, communications & transportation
10
740 - Drawing & decorative arts
10
791 - Public performances
10
780 - Music
9
338 - Production
8
370 - Education
8
070 - News media, journalism & publishing
6
170 - Ethics
6
340 - Law
6
670 - Manufacturing
6
781 - General principles & musical forms
6
001 - Knowledge
5
020 - Library & information sciences
5
700 - The arts; fine & decorative arts
5
808 - Rhetoric & collections of literature
5
153 - Mental processes & intelligence
4
174 - Occupational ethics
4
332 - Financial economics
4
371 - Schools & their activities; special education
4
510 - Mathematics
4
530 - Physics
4
507 - Education, research & related topics
3
600 - Technology
3
777 - [Unassigned]
3
778 - Fields & kinds of photography
3
150 - Psychology
2
155 - Differential & developmental psychology
2
more ...