Classification
658 - General management
815
330 - Economics
528
153 - Mental processes & intelligence
520
000 - Computer science, information & general works
182
700 - The arts; fine & decorative arts
155
333 - Economics of land & energy
131
500 - Natural sciences & mathematics
130
600 - Technology
126
610 - Medicine & health
118
620 - Engineering & allied operations
116
300 - Social sciences
110
320 - Political science
88
363 - Other social problems & services
88
302 - Social interaction
86
380 - Commerce, communications & transportation
81
670 - Manufacturing
81
900 - History & geography
81
650 - Management & auxiliary services
65
332 - Financial economics
64
338 - Production
59
140 - Specific philosophical schools
58
519 - Probabilities & applied mathematics
57
331 - Labor economics
49
340 - Law
48
370 - Education
46
158 - Applied psychology
38
006 - Special computer methods
37
100 - Philosophy & psychology
35
551 - Geology, hydrology & meteorology
35
170 - Ethics
34
576 - Genetics & evolution
34
580 - Plants (Botany)
31
005 - Computer programming, programs & data
25
384 - Communications; telecommunication
23
630 - Agriculture & related technologies
21
570 - Life sciences; biology
19
381 - Commerce
18
720 - Architecture
17
001 - Knowledge
14
410 - Linguistics
13
304 - Factors affecting social behavior
12
361 - Social problems & social welfare in general
10
368 - Insurance
10
511 - General principles of mathematics
10
581 - Specific topics in natural history
10
657 - Accounting
10
150 - Psychology
9
339 - Macroeconomics & related topics
9
540 - Chemistry & allied sciences
9
004 - Data processing & computer science
8
more ...