Classification
000 - Computer science, information & general works
2
001 - Knowledge
16
003 - Systems
33
004 - Data processing & computer science
89
005 - Computer programming, programs & data
96
006 - Special computer methods
91
025 - Library operations
4
040 - [Unassigned]
11
057 - Serials in Slavic languages
1
150 - Psychology
1
300 - Social sciences
20
301 - Sociology & anthropology
2
302 - Social interaction
4
304 - Factors affecting social behavior
1
306 - Culture & institutions
1
307 - Communities
1
310 - Collections of general statistics
1
320 - Political science
1
330 - Economics
17
331 - Labor economics
6
332 - Financial economics
2
333 - Economics of land & energy
5
363 - Other social problems & services
1
370 - Education
2
371 - Schools & their activities; special education
4
381 - Commerce
3
384 - Communications; telecommunication
1
388 - Transportation; ground transportation
1
418 - Standard usage & applied linguistics
2
500 - Natural sciences & mathematics
38
509 - Historical, geographic & persons treatment
1
510 - Mathematics
11
511 - General principles of mathematics
4
512 - Algebra
6
515 - Analysis
44
516 - Geometry
2
518 - Numerical analysis
19
519 - Probabilities & applied mathematics
72
520 - Astronomy & allied sciences
1
526 - Mathematical geography
1
530 - Physics
30
531 - Classical mechanics; solid mechanics
12
534 - Sound & related vibrations
1
535 - Light & infrared & ultraviolet phenomena
1
536 - Heat
4
537 - Electricity & electronics
2
539 - Modern physics
4
541 - Physical chemistry
3
543 - Analytical chemistry
1
547 - Organic chemistry
2
more ...