Classification
658 - General management
692
153 - Mental processes & intelligence
556
330 - Economics
550
000 - Computer science, information & general works
187
700 - The arts; fine & decorative arts
159
500 - Natural sciences & mathematics
134
333 - Economics of land & energy
130
600 - Technology
128
620 - Engineering & allied operations
119
610 - Medicine & health
116
300 - Social sciences
111
320 - Political science
94
900 - History & geography
89
363 - Other social problems & services
87
302 - Social interaction
86
380 - Commerce, communications & transportation
85
670 - Manufacturing
79
650 - Management & auxiliary services
67
332 - Financial economics
64
140 - Specific philosophical schools
57
338 - Production
57
331 - Labor economics
54
340 - Law
47
370 - Education
45
519 - Probabilities & applied mathematics
42
158 - Applied psychology
40
100 - Philosophy & psychology
38
170 - Ethics
38
576 - Genetics & evolution
36
006 - Special computer methods
35
551 - Geology, hydrology & meteorology
35
580 - Plants (Botany)
30
384 - Communications; telecommunication
24
005 - Computer programming, programs & data
22
630 - Agriculture & related technologies
22
570 - Life sciences; biology
19
381 - Commerce
18
001 - Knowledge
17
720 - Architecture
17
304 - Factors affecting social behavior
14
410 - Linguistics
13
361 - Social problems & social welfare in general
10
368 - Insurance
10
581 - Specific topics in natural history
10
150 - Psychology
9
540 - Chemistry & allied sciences
9
657 - Accounting
9
336 - Public finance
8
510 - Mathematics
8
530 - Physics
8
more ...