Classification
000 - Computer science, information & general works
300 - Social sciences
658 - General management
105
302 - Social interaction
92
330 - Economics
62
320 - Political science
54
331 - Labor economics
53
600 - Technology
43
700 - The arts; fine & decorative arts
41
380 - Commerce, communications & transportation
38
900 - History & geography
35
333 - Economics of land & energy
31
500 - Natural sciences & mathematics
31
100 - Philosophy & psychology
29
363 - Other social problems & services
25
301 - Sociology & anthropology
24
338 - Production
24
370 - Education
21
610 - Medicine & health
21
620 - Engineering & allied operations
20
140 - Specific philosophical schools
19
200 - Religion
17
340 - Law
13
170 - Ethics
12
158 - Applied psychology
9
400 - Language
9
384 - Communications; telecommunication
8
410 - Linguistics
8
576 - Genetics & evolution
8
650 - Management & auxiliary services
8
800 - Literature & rhetoric
8
153 - Mental processes & intelligence
7
581 - Specific topics in natural history
7
630 - Agriculture & related technologies
7
780 - Music
7
150 - Psychology
5
551 - Geology, hydrology & meteorology
5
580 - Plants (Botany)
5
001 - Knowledge
4
360 - Social problems & services; associations
4
361 - Social problems & social welfare in general
4
364 - Criminology
4
530 - Physics
4
540 - Chemistry & allied sciences
4
120 - Epistemology, causation & humankind
3
304 - Factors affecting social behavior
3
381 - Commerce
3
414 - Phonology & phonetics
3
612 - Human physiology
3
720 - Architecture
3
more ...