Classification
512 - Algebra
135
511 - General principles of mathematics
113
530 - Physics
107
515 - Analysis
68
514 - Topology
46
519 - Probabilities & applied mathematics
46
516 - Geometry
25
003 - Systems
17
539 - Modern physics
16
121 - Epistemology
11
532 - Fluid mechanics; liquid mechanics
5
006 - Special computer methods
4
510 - Mathematics
4
518 - Numerical analysis
4
621 - Applied physics
4
004 - Data processing & computer science
3
523 - Specific celestial bodies & phenomena
3
620 - Engineering & allied operations
3
624 - Civil engineering
3
629 - Other branches of engineering
3
005 - Computer programming, programs & data
2
184 - Platonic philosophy
2
302 - Social interaction
2
330 - Economics
2
338 - Production
2
501 - Philosophy & theory
2
531 - Classical mechanics; solid mechanics
2
535 - Light & infrared & ultraviolet phenomena
2
536 - Heat
2
550 - Earth sciences
2
551 - Geology, hydrology & meteorology
2
001 - Knowledge
1
110 - Metaphysics
1
111 - Ontology
1
115 - Time
1
123 - Determinism & indeterminism
1
126 - The self
1
128 - Humankind
1
150 - Psychology
1
160 - Logic
1
170 - Ethics
1
174 - Occupational ethics
1
182 - Pre-Socratic Greek philosophies
1
193 - Philosophy of Germany & Austria
1
261 - Social theology
1
262 - Ecclesiology
1
274 - History of Christianity in Europe
1
305 - Social groups
1
321 - Systems of governments & states
1
323 - Civil & political rights
1
more ...