Classification
000 - Computer science, information & general works
43
001 - Knowledge
20
003 - Systems
4
004 - Data processing & computer science
32
005 - Computer programming, programs & data
69
006 - Special computer methods
46
100 - Philosophy & psychology
1
133 - Specific topics in parapsychology & occultism
1
146 - Naturalism & related systems
1
149 - Other philosophical systems
1
150 - Psychology
1
153 - Mental processes & intelligence
13
155 - Differential & developmental psychology
2
158 - Applied psychology
1
300 - Social sciences
20
302 - Social interaction
20
303 - Social processes
1
330 - Economics
107
331 - Labor economics
41
332 - Financial economics
26
333 - Economics of land & energy
3
338 - Production
14
355 - Military science
1
368 - Insurance
5
371 - Schools & their activities; special education
2
372 - Elementary education
1
374 - Adult education
6
381 - Commerce
4
384 - Communications; telecommunication
18
401 - Philosophy & theory
1
415 - Grammar
1
500 - Natural sciences & mathematics
232
501 - Philosophy & theory
4
502 - Miscellany
1
510 - Mathematics
511 - General principles of mathematics
41
512 - Algebra
52
513 - Arithmetic
2
514 - Topology
10
515 - Analysis
86
516 - Geometry
16
518 - Numerical analysis
12
519 - Probabilities & applied mathematics
359
520 - Astronomy & allied sciences
1
523 - Specific celestial bodies & phenomena
1
526 - Mathematical geography
1
530 - Physics
12
531 - Classical mechanics; solid mechanics
3
532 - Fluid mechanics; liquid mechanics
2
533 - Gas mechanics
1
more ...