Classification
658 - General management
430
330 - Economics
362
005 - Computer programming, programs & data
233
331 - Labor economics
138
302 - Social interaction
121
338 - Production
116
500 - Natural sciences & mathematics
109
000 - Computer science, information & general works
105
650 - Management & auxiliary services
104
158 - Applied psychology
99
006 - Special computer methods
95
620 - Engineering & allied operations
90
381 - Commerce
84
300 - Social sciences
83
332 - Financial economics
72
384 - Communications; telecommunication
72
004 - Data processing & computer science
57
153 - Mental processes & intelligence
47
745 - Decorative arts
45
770 - Photography, photographs & computer art
45
670 - Manufacturing
38
380 - Commerce, communications & transportation
30
621 - Applied physics
30
374 - Adult education
26
011 - Bibliographies
19
150 - Psychology
19
170 - Ethics
18
616 - Diseases
18
510 - Mathematics
14
657 - Accounting
14
155 - Differential & developmental psychology
12
303 - Social processes
12
339 - Macroeconomics & related topics
12
771 - Techniques, equipment & materials
11
900 - History & geography
11
001 - Knowledge
10
519 - Probabilities & applied mathematics
10
800 - Literature & rhetoric
10
808 - Rhetoric & collections of literature
10
610 - Medicine & health
9
659 - Advertising & public relations
9
700 - The arts; fine & decorative arts
7
778 - Fields & kinds of photography
7
152 - Perception, movement, emotions & drives
6
629 - Other branches of engineering
6
781 - General principles & musical forms
6
306 - Culture & institutions
5
320 - Political science
5
340 - Law
5
363 - Other social problems & services
5
more ...