Classification
000 - Computer science, information & general works
12
001 - Knowledge
1
004 - Data processing & computer science
1
005 - Computer programming, programs & data
1
006 - Special computer methods
1
100 - Philosophy & psychology
26
120 - Epistemology, causation & humankind
2
140 - Specific philosophical schools
6
150 - Psychology
1
153 - Mental processes & intelligence
7
158 - Applied psychology
6
170 - Ethics
7
200 - Religion
4
297 - Islam, Babism & Bahai Faith
1
300 - Social sciences
301 - Sociology & anthropology
14
302 - Social interaction
36
304 - Factors affecting social behavior
5
320 - Political science
34
330 - Economics
65
331 - Labor economics
5
332 - Financial economics
1
333 - Economics of land & energy
26
336 - Public finance
1
338 - Production
10
340 - Law
8
350 - Public administration & military science
2
361 - Social problems & social welfare in general
1
363 - Other social problems & services
10
364 - Criminology
1
370 - Education
65
371 - Schools & their activities; special education
1
380 - Commerce, communications & transportation
11
381 - Commerce
30
384 - Communications; telecommunication
3
400 - Language
5
410 - Linguistics
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
36
510 - Mathematics
1
519 - Probabilities & applied mathematics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
6
576 - Genetics & evolution
4
580 - Plants (Botany)
3
581 - Specific topics in natural history
3
600 - Technology
20
610 - Medicine & health
11
620 - Engineering & allied operations
7
more ...