Classification
000 - Computer science, information & general works
32
003 - Systems
100
004 - Data processing & computer science
283
005 - Computer programming, programs & data
92
006 - Special computer methods
106
025 - Library operations
1
100 - Philosophy & psychology
2
140 - Specific philosophical schools
4
300 - Social sciences
1
302 - Social interaction
4
303 - Social processes
4
320 - Political science
2
321 - Systems of governments & states
1
327 - International relations
3
330 - Economics
17
331 - Labor economics
11
332 - Financial economics
1
333 - Economics of land & energy
32
338 - Production
22
340 - Law
16
350 - Public administration & military science
1
361 - Social problems & social welfare in general
5
363 - Other social problems & services
10
370 - Education
4
374 - Adult education
3
380 - Commerce, communications & transportation
22
381 - Commerce
1
384 - Communications; telecommunication
26
400 - Language
1
410 - Linguistics
4
418 - Standard usage & applied linguistics
1
500 - Natural sciences & mathematics
89
509 - Historical, geographic & persons treatment
4
510 - Mathematics
6
511 - General principles of mathematics
15
512 - Algebra
4
515 - Analysis
18
516 - Geometry
2
518 - Numerical analysis
8
519 - Probabilities & applied mathematics
73
520 - Astronomy & allied sciences
4
523 - Specific celestial bodies & phenomena
3
526 - Mathematical geography
3
530 - Physics
93
531 - Classical mechanics; solid mechanics
10
534 - Sound & related vibrations
32
535 - Light & infrared & ultraviolet phenomena
20
536 - Heat
2
537 - Electricity & electronics
54
538 - Magnetism
7
more ...