Classification
530 - Physics
2,563
515 - Analysis
941
620 - Engineering & allied operations
428
519 - Probabilities & applied mathematics
356
621 - Applied physics
264
539 - Modern physics
226
512 - Algebra
222
510 - Mathematics
176
516 - Geometry
171
518 - Numerical analysis
167
531 - Classical mechanics; solid mechanics
160
003 - Systems
143
500 - Natural sciences & mathematics
133
536 - Heat
109
520 - Astronomy & allied sciences
108
523 - Specific celestial bodies & phenomena
101
006 - Special computer methods
98
537 - Electricity & electronics
72
541 - Physical chemistry
69
004 - Data processing & computer science
67
629 - Other branches of engineering
65
514 - Topology
62
535 - Light & infrared & ultraviolet phenomena
52
511 - General principles of mathematics
49
571 - Physiology & related subjects
46
501 - Philosophy & theory
45
550 - Earth sciences
41
333 - Economics of land & energy
34
005 - Computer programming, programs & data
30
700 - The arts; fine & decorative arts
28
570 - Life sciences; biology
26
000 - Computer science, information & general works
25
300 - Social sciences
25
551 - Geology, hydrology & meteorology
25
001 - Knowledge
24
900 - History & geography
20
330 - Economics
17
534 - Sound & related vibrations
16
526 - Mathematical geography
15
610 - Medicine & health
14
612 - Human physiology
14
538 - Magnetism
13
540 - Chemistry & allied sciences
12
600 - Technology
12
624 - Civil engineering
12
670 - Manufacturing
12
548 - Crystallography
11
658 - General management
11
543 - Analytical chemistry
10
910 - Geography & travel
10
more ...