Classification
530 - Physics
2,388
515 - Analysis
610
620 - Engineering & allied operations
388
519 - Probabilities & applied mathematics
284
621 - Applied physics
224
539 - Modern physics
189
531 - Classical mechanics; solid mechanics
139
518 - Numerical analysis
138
516 - Geometry
131
512 - Algebra
125
003 - Systems
124
536 - Heat
107
510 - Mathematics
84
006 - Special computer methods
79
523 - Specific celestial bodies & phenomena
79
500 - Natural sciences & mathematics
76
520 - Astronomy & allied sciences
70
537 - Electricity & electronics
63
541 - Physical chemistry
58
004 - Data processing & computer science
54
629 - Other branches of engineering
54
535 - Light & infrared & ultraviolet phenomena
42
550 - Earth sciences
41
571 - Physiology & related subjects
39
514 - Topology
35
501 - Philosophy & theory
29
005 - Computer programming, programs & data
26
511 - General principles of mathematics
26
333 - Economics of land & energy
23
551 - Geology, hydrology & meteorology
20
330 - Economics
18
534 - Sound & related vibrations
17
526 - Mathematical geography
14
700 - The arts; fine & decorative arts
13
570 - Life sciences; biology
12
624 - Civil engineering
11
910 - Geography & travel
11
538 - Magnetism
10
670 - Manufacturing
10
000 - Computer science, information & general works
9
543 - Analytical chemistry
8
548 - Crystallography
8
612 - Human physiology
8
610 - Medicine & health
7
658 - General management
7
001 - Knowledge
5
300 - Social sciences
5
332 - Financial economics
5
509 - Historical, geographic & persons treatment
5
363 - Other social problems & services
4
more ...