Classification
000 - Computer science, information & general works
95
001 - Knowledge
1
003 - Systems
1
004 - Data processing & computer science
5
005 - Computer programming, programs & data
89
006 - Special computer methods
7
100 - Philosophy & psychology
3
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
41
160 - Logic
1
302 - Social interaction
4
304 - Factors affecting social behavior
4
320 - Political science
12
330 - Economics
59
331 - Labor economics
89
333 - Economics of land & energy
131
338 - Production
4
340 - Law
13
355 - Military science
1
363 - Other social problems & services
73
364 - Criminology
5
370 - Education
11
374 - Adult education
16
380 - Commerce, communications & transportation
83
381 - Commerce
2
384 - Communications; telecommunication
67
400 - Language
8
410 - Linguistics
6
414 - Phonology & phonetics
17
500 - Natural sciences & mathematics
105
502 - Miscellany
1
510 - Mathematics
5
519 - Probabilities & applied mathematics
1
529 - Chronology
1
530 - Physics
17
538 - Magnetism
1
539 - Modern physics
1
540 - Chemistry & allied sciences
19
550 - Earth sciences
4
551 - Geology, hydrology & meteorology
12
576 - Genetics & evolution
31
580 - Plants (Botany)
36
581 - Specific topics in natural history
1
600 - Technology
298
604 - Special topics
1
610 - Medicine & health
51
612 - Human physiology
1
620 - Engineering & allied operations
621 - Applied physics
20
628 - Sanitary & municipal engineering
1
more ...