Classification
000 - Computer science, information & general works
14
001 - Knowledge
71
004 - Data processing & computer science
4
005 - Computer programming, programs & data
5
006 - Special computer methods
1
100 - Philosophy & psychology
10
140 - Specific philosophical schools
18
150 - Psychology
1
152 - Perception, movement, emotions & drives
1
153 - Mental processes & intelligence
7
158 - Applied psychology
10
170 - Ethics
11
200 - Religion
5
300 - Social sciences
301 - Sociology & anthropology
16
302 - Social interaction
86
303 - Social processes
2
304 - Factors affecting social behavior
7
320 - Political science
132
330 - Economics
228
331 - Labor economics
49
332 - Financial economics
6
333 - Economics of land & energy
14
338 - Production
32
340 - Law
35
343 - Military, tax, trade & industrial law
1
344 - Labor, social, education & cultural law
2
360 - Social problems & services; associations
3
361 - Social problems & social welfare in general
4
362 - Social welfare problems & services
1
363 - Other social problems & services
33
364 - Criminology
4
368 - Insurance
9
370 - Education
6
380 - Commerce, communications & transportation
15
381 - Commerce
12
384 - Communications; telecommunication
6
400 - Language
1
414 - Phonology & phonetics
3
500 - Natural sciences & mathematics
81
510 - Mathematics
1
540 - Chemistry & allied sciences
3
551 - Geology, hydrology & meteorology
9
576 - Genetics & evolution
4
580 - Plants (Botany)
5
581 - Specific topics in natural history
8
600 - Technology
11
610 - Medicine & health
9
612 - Human physiology
3
620 - Engineering & allied operations
12
more ...