Classification
300 - Social sciences
658 - General management
302 - Social interaction
2,437
330 - Economics
2,375
500 - Natural sciences & mathematics
1,459
670 - Manufacturing
1,431
338 - Production
850
331 - Labor economics
720
650 - Management & auxiliary services
330
381 - Commerce
298
384 - Communications; telecommunication
277
158 - Applied psychology
237
153 - Mental processes & intelligence
216
380 - Commerce, communications & transportation
174
000 - Computer science, information & general works
115
620 - Engineering & allied operations
88
332 - Financial economics
81
001 - Knowledge
68
745 - Decorative arts
59
368 - Insurance
47
150 - Psychology
34
303 - Social processes
34
005 - Computer programming, programs & data
26
170 - Ethics
26
006 - Special computer methods
22
659 - Advertising & public relations
22
362 - Social welfare problems & services
20
510 - Mathematics
17
155 - Differential & developmental psychology
16
004 - Data processing & computer science
15
152 - Perception, movement, emotions & drives
14
352 - General considerations of public administration
13
304 - Factors affecting social behavior
12
371 - Schools & their activities; special education
12
519 - Probabilities & applied mathematics
12
610 - Medicine & health
11
808 - Rhetoric & collections of literature
10
320 - Political science
9
700 - The arts; fine & decorative arts
8
011 - Bibliographies
7
374 - Adult education
7
600 - Technology
7
340 - Law
6
800 - Literature & rhetoric
6
100 - Philosophy & psychology
5
174 - Occupational ethics
5
370 - Education
5
651 - Office services
5
361 - Social problems & social welfare in general
4
364 - Criminology
4
more ...