Classification
330 - Economics
301
658 - General management
289
005 - Computer programming, programs & data
247
006 - Special computer methods
161
331 - Labor economics
161
302 - Social interaction
129
004 - Data processing & computer science
121
381 - Commerce
113
500 - Natural sciences & mathematics
106
338 - Production
93
332 - Financial economics
84
745 - Decorative arts
83
770 - Photography, photographs & computer art
66
300 - Social sciences
49
657 - Accounting
46
620 - Engineering & allied operations
44
000 - Computer science, information & general works
43
771 - Techniques, equipment & materials
40
670 - Manufacturing
39
384 - Communications; telecommunication
38
650 - Management & auxiliary services
33
621 - Applied physics
25
510 - Mathematics
23
659 - Advertising & public relations
21
519 - Probabilities & applied mathematics
16
158 - Applied psychology
14
339 - Macroeconomics & related topics
12
153 - Mental processes & intelligence
11
380 - Commerce, communications & transportation
11
808 - Rhetoric & collections of literature
10
025 - Library operations
9
794 - Indoor games of skill
8
371 - Schools & their activities; special education
7
374 - Adult education
7
778 - Fields & kinds of photography
7
150 - Psychology
6
600 - Technology
6
777 - [Unassigned]
6
781 - General principles & musical forms
6
515 - Analysis
5
001 - Knowledge
4
512 - Algebra
4
651 - Office services
4
741 - Drawing & drawings
4
775 - Digital photography
4
155 - Differential & developmental psychology
3
346 - Private law
3
791 - Public performances
3
793 - Indoor games & amusements
3
070 - News media, journalism & publishing
2
more ...