Classification
000 - Computer science, information & general works
1
001 - Knowledge
11
003 - Systems
5
004 - Data processing & computer science
9
005 - Computer programming, programs & data
12
006 - Special computer methods
48
040 - [Unassigned]
3
057 - Serials in Slavic languages
1
100 - Philosophy & psychology
2
121 - Epistemology
1
140 - Specific philosophical schools
3
150 - Psychology
1
153 - Mental processes & intelligence
1
300 - Social sciences
13
301 - Sociology & anthropology
1
302 - Social interaction
2
303 - Social processes
2
304 - Factors affecting social behavior
4
305 - Social groups
1
320 - Political science
34
330 - Economics
54
331 - Labor economics
3
332 - Financial economics
5
333 - Economics of land & energy
6
338 - Production
2
339 - Macroeconomics & related topics
2
340 - Law
5
350 - Public administration & military science
1
355 - Military science
1
363 - Other social problems & services
3
368 - Insurance
3
380 - Commerce, communications & transportation
2
381 - Commerce
1
382 - International commerce
1
383 - Postal communication
1
410 - Linguistics
2
500 - Natural sciences & mathematics
8
510 - Mathematics
7
511 - General principles of mathematics
6
512 - Algebra
5
515 - Analysis
11
518 - Numerical analysis
3
519 - Probabilities & applied mathematics
23
520 - Astronomy & allied sciences
1
523 - Specific celestial bodies & phenomena
2
526 - Mathematical geography
1
530 - Physics
3
531 - Classical mechanics; solid mechanics
3
539 - Modern physics
1
540 - Chemistry & allied sciences
1
more ...