Classification
300 - Social sciences
001 - Knowledge
334
500 - Natural sciences & mathematics
112
330 - Economics
60
658 - General management
41
302 - Social interaction
30
370 - Education
30
670 - Manufacturing
29
320 - Political science
23
510 - Mathematics
20
000 - Computer science, information & general works
18
100 - Philosophy & psychology
18
600 - Technology
18
900 - History & geography
15
620 - Engineering & allied operations
13
333 - Economics of land & energy
12
610 - Medicine & health
12
338 - Production
11
700 - The arts; fine & decorative arts
11
363 - Other social problems & services
9
140 - Specific philosophical schools
7
301 - Sociology & anthropology
7
332 - Financial economics
7
380 - Commerce, communications & transportation
6
519 - Probabilities & applied mathematics
6
576 - Genetics & evolution
6
331 - Labor economics
5
540 - Chemistry & allied sciences
5
170 - Ethics
4
381 - Commerce
4
551 - Geology, hydrology & meteorology
4
581 - Specific topics in natural history
4
120 - Epistemology, causation & humankind
3
153 - Mental processes & intelligence
3
414 - Phonology & phonetics
3
530 - Physics
3
580 - Plants (Botany)
3
612 - Human physiology
3
340 - Law
2
384 - Communications; telecommunication
2
630 - Agriculture & related technologies
2
780 - Music
2
005 - Computer programming, programs & data
1
160 - Logic
1
200 - Religion
1
303 - Social processes
1
336 - Public finance
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
more ...